update websocketmanager

update complete notification flow

Issue-ID: CCSDK-3252
Signed-off-by: Michael DÜrre <michael.duerre@highstreet-technologies.com>
Change-Id: I87ba00f615707b942471fcace57bcda50ce37e61

9 files changed, 1080 insertions, 0 deletions

diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManager.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManager.java
new file mode 100644
index 000000000..7b4916d5a
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManager.java
@@ -0,0 +1,130 @@
+/*
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.eclipse.jetty.websocket.servlet.WebSocketServlet;
+import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.WebSocketManagerSocket.EventInputCallback;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils.AkkaConfig;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils.AkkaConfig.ClusterConfig;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils.AkkaConfig.ClusterNodeInfo;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.websocket.SyncWebSocketClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class WebSocketManager extends WebSocketServlet {
+
+    private static final long serialVersionUID = -681665669062744439L;
+
+    private static final Logger LOG = LoggerFactory.getLogger(WebSocketManager.class.getName());
+    private static final String APPLICATION_NAME = WebSocketManager.class.getName();
+    private static final int PORT = 8181;
+    private final EventInputCallback rpcEventInputCallback;
+    private final AkkaConfig akkaConfig;
+    /**
+     * timeout for websocket with no messages in ms
+     */
+    //private static final long IDLE_TIMEOUT = 5 * 60 * 1000L;
+    private static final long IDLE_TIMEOUT = 0L;
+
+    private final ArrayList<URI> clusterNodeClients = new ArrayList<>();
+
+    public WebSocketManager() {
+        this(null, null);
+    }
+
+    public WebSocketManager(AkkaConfig akkaconfig, EventInputCallback cb) {
+        super();
+        this.akkaConfig = akkaconfig;
+        if (cb != null) {
+            this.rpcEventInputCallback = cb;
+        } else {
+            this.rpcEventInputCallback = message -> {
+                LOG.debug("onMessagePushed: " + message);
+                SyncWebSocketClient client;
+                for (URI clientURI : WebSocketManager.this.clusterNodeClients) {
+                    client = new SyncWebSocketClient(clientURI);
+                    LOG.debug("try to push message to " + client.getURI());
+                    client.openAndSendAndCloseSync(message);
+                }
+            };
+        }
+        LOG.info("Create servlet for {}", APPLICATION_NAME);
+    }
+
+    @Override
+    public void configure(WebSocketServletFactory factory) {
+        LOG.info("Configure provider for {}", APPLICATION_NAME);
+        // set a second timeout
+        factory.getPolicy().setIdleTimeout(IDLE_TIMEOUT);
+        factory.getPolicy().setMaxBinaryMessageSize(1);
+        factory.getPolicy().setMaxTextMessageSize(64 * 1024);
+
+        // register Socket as the WebSocket to create on Upgrade
+        factory.register(WebSocketManagerSocket.class);
+
+        AkkaConfig cfg = this.akkaConfig;
+        if (cfg == null) {
+            try {
+                cfg = AkkaConfig.load();
+            } catch (Exception e) {
+                LOG.warn("problem loading akka config: " + e.getMessage());
+            }
+        }
+        if (cfg != null && cfg.isCluster()) {
+            this.initWSClients(cfg.getClusterConfig());
+        }
+    }
+
+    /**********************************************************
+     * Private functions
+     */
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        if (req.getHeader("Upgrade") != null) {
+            /* Accept upgrade request */
+            resp.setStatus(101);
+            resp.setHeader("Upgrade", "XYZP");
+            resp.setHeader("Connection", "Upgrade");
+            resp.setHeader("OtherHeaderB", "Value");
+        }
+    }
+
+    private void initWSClients(ClusterConfig clusterConfig) {
+        for (ClusterNodeInfo nodeConfig : clusterConfig.getSeedNodes()) {
+            if (clusterConfig.isMe(nodeConfig)) {
+                continue;
+            }
+            String url = String.format("ws://%s:%d/websocket", nodeConfig.getRemoteAddress(), PORT);
+            try {
+                LOG.debug("registering ws client for " + url);
+                clusterNodeClients.add(new URI(url));
+            } catch (URISyntaxException e) {
+                LOG.warn("problem instantiating wsclient for url: " + url);
+            }
+        }
+    }
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerProvider.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerProvider.java
new file mode 100644
index 000000000..0b6e9b453
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerProvider.java
@@ -0,0 +1,109 @@
+/*
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager;
+
+import java.time.Instant;
+import javax.servlet.ServletException;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.WebsocketManagerService;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.NotificationOutput;
+import org.onap.ccsdk.features.sdnr.wt.yang.mapper.YangToolsMapperHelper;
+import org.opendaylight.mdsal.dom.api.DOMNotification;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.DateAndTime;
+import org.opendaylight.yangtools.yang.binding.Notification;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.osgi.service.http.HttpService;
+import org.osgi.service.http.NamespaceException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class WebSocketManagerProvider implements WebsocketManagerService, AutoCloseable {
+
+    private static final Logger LOG = LoggerFactory.getLogger(WebSocketManagerProvider.class);
+    private static final String APPLICATION_NAME = WebSocketManagerProvider.class.getName();
+    private static final String ALIAS = "/websocket";
+
+    private WebSocketManager wsServlet = null;
+
+    public WebSocketManagerProvider() {
+        LOG.info("Creating provider for {}", APPLICATION_NAME);
+    }
+
+
+    public void init() {
+        LOG.info("Init provider for {}", APPLICATION_NAME);
+    }
+
+    @Override
+    public void close() throws Exception {
+        LOG.info("Close provider for {}", APPLICATION_NAME);
+    }
+
+    public void onUnbindService(HttpService httpService) {
+        httpService.unregister(ALIAS);
+        wsServlet = null;
+    }
+
+    public void onBindService(HttpService httpService) throws ServletException, NamespaceException {
+        if (httpService == null) {
+            LOG.warn("Unable to inject HttpService into DluxLoader. dlux modules won't work without httpService");
+        } else {
+
+            if (wsServlet == null) {
+                wsServlet = new WebSocketManager();
+                httpService.registerServlet(ALIAS, wsServlet, null, null);
+                LOG.info("websocket servlet registered.");
+            } else {
+                LOG.warn("Servelt ");
+            }
+        }
+
+    }
+
+    public WebSocketManager getWsServlet() {
+        return wsServlet;
+    }
+
+    public void setWsServlet(WebSocketManager wsServlet) {
+        this.wsServlet = wsServlet;
+    }
+
+
+    @Override
+    public void sendNotification(Notification notification, String nodeId, QName eventType) {
+        this.sendNotification(notification, nodeId, eventType, YangToolsMapperHelper.getTime(notification,Instant.now()));
+    }
+
+    @Override
+    public void sendNotification(Notification notification, String nodeId, QName eventType, DateAndTime eventTime) {
+        WebSocketManagerSocket.broadCast(new NotificationOutput(notification, nodeId, eventType, eventTime));
+
+    }
+
+    @Override
+    public void sendNotification(DOMNotification notification, String nodeId, QName eventType) {
+        LOG.warn("not yet implemented");
+
+    }
+
+    @Override
+    public void sendNotification(DOMNotification notification, String nodeId, QName eventType, DateAndTime eventTime) {
+        LOG.warn("not yet implemented");
+
+    }
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerSocket.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerSocket.java
new file mode 100644
index 000000000..945de3c1f
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/WebSocketManagerSocket.java
@@ -0,0 +1,245 @@
+/*
+* ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Random;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.eclipse.jetty.websocket.api.Session;
+import org.eclipse.jetty.websocket.api.WebSocketAdapter;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.NotificationOutput;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.ReducedSchemaInfo;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.ScopeRegistration;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.ScopeRegistration.DataType;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.ScopeRegistrationResponse;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils.UserScopes;
+import org.onap.ccsdk.features.sdnr.wt.yang.mapper.YangToolsMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class WebSocketManagerSocket extends WebSocketAdapter {
+
+    private static final Logger LOG = LoggerFactory.getLogger(WebSocketManagerSocket.class.getName());
+    public static final String MSG_KEY_DATA = "data";
+    public static final DataType MSG_KEY_SCOPES = DataType.scopes;
+    public static final String MSG_KEY_PARAM = "param";
+    public static final String MSG_KEY_VALUE = "value";
+    public static final String MSG_KEY_SCOPE = "scope";
+
+    public static final String KEY_NODEID = "nodeId";
+    public static final String KEY_EVENTTYPE = "eventType";
+    private static final String REGEX_SCOPEREGISTRATION = "\"data\"[\\s]*:[\\s]*\"scopes\"";
+    private static final Pattern PATTERN_SCOPEREGISTRATION =
+            Pattern.compile(REGEX_SCOPEREGISTRATION, Pattern.MULTILINE);
+    private static final Random RND = new Random();
+
+
+    /**
+     * list of all sessionids
+     */
+    private static final List<String> sessionIds = new ArrayList<>();
+    /**
+     * map of sessionid <=> UserScopes
+     */
+    private static final HashMap<String, UserScopes> userScopesList = new HashMap<>();
+    /**
+     * map of class.hashCode <=> class
+     */
+    private static final HashMap<String, WebSocketManagerSocket> clientList = new HashMap<>();
+
+    private static final YangToolsMapper mapper = new YangToolsMapper();
+    private final String myUniqueSessionId;
+
+    private Session session = null;
+
+    public interface EventInputCallback {
+        void onMessagePushed(final String message) throws Exception;
+    }
+
+    public WebSocketManagerSocket() {
+        this.myUniqueSessionId = _genSessionId();
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        sessionIds.remove(this.myUniqueSessionId);
+    }
+
+    private static String _genSessionId() {
+        String sid = String.valueOf(RND.nextLong());
+        while (sessionIds.contains(sid)) {
+            sid = String.valueOf(RND.nextLong());
+        }
+        sessionIds.add(sid);
+        return sid;
+    }
+
+    @Override
+    public void onWebSocketText(String message) {
+        LOG.info("{} has sent {}", this.getRemoteAdr(), message);
+        if (!this.manageClientRequest(message)) {
+            this.manageClientRequest2(message);
+        }
+    }
+
+    @Override
+    public void onWebSocketBinary(byte[] payload, int offset, int len) {
+        LOG.debug("Binary not supported");
+    }
+
+    @Override
+    public void onWebSocketConnect(Session sess) {
+        this.session = sess;
+        clientList.put(String.valueOf(this.hashCode()), this);
+        LOG.debug("client connected from " + this.getRemoteAdr());
+    }
+
+    @Override
+    public void onWebSocketClose(int statusCode, String reason) {
+        clientList.remove(String.valueOf(this.hashCode()));
+        LOG.debug("client disconnected from " + this.getRemoteAdr());
+    }
+
+    @Override
+    public void onWebSocketError(Throwable cause) {
+        LOG.debug("error caused on " + this.getRemoteAdr() + " :" + cause.getMessage());
+        // super.onWebSocketError(cause);
+    }
+
+    private String getRemoteAdr() {
+        String adr = "unknown";
+        try {
+            adr = this.session.getRemoteAddress().toString();
+        } catch (Exception e) {
+            LOG.debug("error resolving adr: {}", e.getMessage());
+        }
+        return adr;
+    }
+
+    /**
+     *
+     * @param request is a json object {"data":"scopes","scopes":["scope1","scope2",...]}
+     * @return if handled
+     */
+    private boolean manageClientRequest(String request) {
+        boolean ret = false;
+        final Matcher matcher = PATTERN_SCOPEREGISTRATION.matcher(request);
+        if(!matcher.find()) {
+            return false;
+        }
+        try {
+            ScopeRegistration registration = mapper.readValue(request, ScopeRegistration.class);
+            if (registration!=null && registration.validate() && registration.isType(MSG_KEY_SCOPES)) {
+                ret = true;
+                String sessionId = this.getSessionId();
+                UserScopes clientDto = new UserScopes();
+                clientDto.setScopes(registration.getScopes());
+                userScopesList.put(sessionId, clientDto);
+                this.send(mapper.writeValueAsString(ScopeRegistrationResponse.success(registration.getScopes())));
+            }
+
+        } catch (JsonProcessingException e) {
+            LOG.warn("problem set scope: " + e.getMessage());
+            try {
+                this.send(mapper.writeValueAsString(ScopeRegistrationResponse.error(e.getMessage())));
+            } catch (JsonProcessingException e1) {
+                LOG.warn("problem sending error response via ws: " + e1);
+            }
+        }
+        return ret;
+    }
+
+    /*
+     * broadcast message to all your clients
+     */
+    private void manageClientRequest2(String request) {
+        try {
+            NotificationOutput notification = mapper.readValue(request, NotificationOutput.class);
+            if (notification.getNodeId() != null && notification.getType() != null) {
+                this.sendToAll(notification.getNodeId(), notification.getType(), request);
+            }
+        } catch (Exception e) {
+            LOG.warn("handle ws request failed:" + e.getMessage());
+        }
+    }
+
+    public void send(String msg) {
+        try {
+            LOG.trace("sending {}", msg);
+            this.session.getRemote().sendString(msg);
+        } catch (Exception e) {
+            LOG.warn("problem sending message: " + e.getMessage());
+        }
+    }
+
+    public String getSessionId() {
+        return this.myUniqueSessionId;
+    }
+
+    private void sendToAll(NotificationOutput output) {
+        try {
+            this.sendToAll(output.getNodeId(), output.getType(), mapper.writeValueAsString(output));
+        } catch (JsonProcessingException e) {
+            LOG.warn("problem serializing noitifcation: ", e);
+        }
+    }
+
+    private void sendToAll(String nodeId, ReducedSchemaInfo reducedSchemaInfo, String notification) {
+        if (clientList.size() > 0) {
+            for (Map.Entry<String, WebSocketManagerSocket> entry : clientList.entrySet()) {
+                WebSocketManagerSocket socket = entry.getValue();
+                if (socket != null) {
+                    try {
+                        UserScopes clientScopes = userScopesList.get(socket.getSessionId());
+                        if (clientScopes != null) {
+                            if (clientScopes.hasScope(nodeId, reducedSchemaInfo)) {
+                                socket.send(notification);
+                            } else {
+                                LOG.debug("client has not scope {}", reducedSchemaInfo);
+                            }
+                        } else {
+                            LOG.debug("no scopes for notifications registered");
+                        }
+                    } catch (Exception ioe) {
+                        LOG.warn(ioe.getMessage());
+                    }
+                } else {
+                    LOG.debug("cannot broadcast. socket is null");
+                }
+            }
+        }
+    }
+
+    public static void broadCast(NotificationOutput output) {
+        if (clientList.size() > 0) {
+            Set<Entry<String, WebSocketManagerSocket>> e = clientList.entrySet();
+            WebSocketManagerSocket s = e.iterator().next().getValue();
+            if (s != null) {
+                s.sendToAll(output);
+            }
+        }
+    }
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/data/TimeRateLimitingQueue.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/data/TimeRateLimitingQueue.java
new file mode 100644
index 000000000..6627eeadf
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/data/TimeRateLimitingQueue.java
@@ -0,0 +1,34 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : ccsdk features
+ * ================================================================================
+ * Copyright (C) 2020 highstreet technologies GmbH Intellectual Property.
+ * All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager.data;
+
+import java.util.concurrent.ArrayBlockingQueue;
+
+public class TimeRateLimitingQueue<T> extends ArrayBlockingQueue<T>{
+
+    public TimeRateLimitingQueue(int capacity) {
+        super(capacity);
+        // TODO Auto-generated constructor stub
+    }
+
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/AkkaConfig.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/AkkaConfig.java
new file mode 100644
index 000000000..794515bb2
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/AkkaConfig.java
@@ -0,0 +1,207 @@
+/*
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils;
+
+import com.typesafe.config.Config;
+import com.typesafe.config.ConfigFactory;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.WebSocketManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class AkkaConfig {
+
+    private static final Logger LOG = LoggerFactory.getLogger(WebSocketManager.class.getName());
+
+    public static class ClusterNodeInfo {
+        @Override
+        public String toString() {
+            return "ClusterNodeInfo [protocol=" + protocol + ", clusterName=" + clusterName + ", remoteAdr=" + remoteAdr
+                    + ", port=" + port + "]";
+        }
+
+        private final String protocol;
+        private final String clusterName;
+        private final String remoteAdr;
+        private final int port;
+
+        public String getRemoteAddress() {
+            return this.remoteAdr;
+        }
+
+        public ClusterNodeInfo(String s) throws Exception {
+            final String regex = "([a-z.]*):\\/\\/([a-zA-Z0-9-]*)@([a-zA-Z0-9.-]*):([0-9]*)";
+            final Pattern pattern = Pattern.compile(regex);
+            final Matcher matcher = pattern.matcher(s);
+            if (!matcher.find()) {
+                throw new Exception("invalid seedNode format");
+            }
+            this.protocol = matcher.group(1);
+            this.clusterName = matcher.group(2);
+            this.remoteAdr = matcher.group(3);
+            this.port = Integer.parseInt(matcher.group(4));
+        }
+    }
+    public static class ClusterRoleInfo {
+        @Override
+        public String toString() {
+            return "ClusterRoleInfo [Role=" + Role + ", Index=" + Index + "]";
+        }
+
+        private final String Role;
+        private final int Index;
+
+        public ClusterRoleInfo(String s) throws Exception {
+            final String regex = "([a-z]*)-([0-9]*)";
+            final Pattern pattern = Pattern.compile(regex);
+            final Matcher matcher = pattern.matcher(s);
+            if (!matcher.find()) {
+                throw new Exception("invalid role format");
+            }
+            this.Role = matcher.group(1);
+            this.Index = Integer.parseInt(matcher.group(2));
+        }
+
+    }
+    public static class ClusterConfig {
+        @Override
+        public String toString() {
+            return "ClusterConfig [seedNodes=" + seedNodes + ", roles=" + roles + "]";
+        }
+
+        private final List<ClusterNodeInfo> seedNodes;
+        private final List<ClusterRoleInfo> roles;
+        private final ClusterNodeInfo ismeInfo;
+
+        public ClusterConfig(Config o) throws Exception {
+            {
+                this.seedNodes = new ArrayList<>();
+                List<String> a = o.getStringList("seed-nodes");
+                for (int i = 0; i < a.size(); i++) {
+                    ClusterNodeInfo info = new ClusterNodeInfo(a.get(i));
+                    this.seedNodes.add(info);
+                }
+                this.roles = new ArrayList<>();
+                a = o.getStringList("roles");
+                for (int i = 0; i < a.size(); i++) {
+                    ClusterRoleInfo s = new ClusterRoleInfo(a.get(i));
+                    this.roles.add(s);
+                }
+                int idx = this.roles.get(0).Index - 1;
+                if (idx >= 0 && idx < this.seedNodes.size()) {
+                    this.ismeInfo = this.seedNodes.get(idx);
+                } else {
+                    this.ismeInfo = null;
+                }
+            }
+
+        }
+
+        public boolean isCluster() {
+            return this.seedNodes != null ? this.seedNodes.size() > 1 : false;
+        }
+
+        public boolean isMe(ClusterNodeInfo i) {
+            return this.ismeInfo != null ? this.ismeInfo.equals(i) : false;
+        }
+
+        public List<ClusterNodeInfo> getSeedNodes() {
+            return this.seedNodes;
+        }
+    }
+
+    private static final String DEFAULT_FILENAME = "configuration/initial/akka.conf";
+    private final File file;
+    private final String resourceFilename;
+    private final String fileContent;
+    private ClusterConfig cluserConfig;
+
+    public ClusterConfig getClusterConfig() {
+        return this.cluserConfig;
+    }
+
+    private AkkaConfig(File file, boolean isResource) {
+        this.file = isResource ? null : file;
+        this.fileContent = null;
+        this.resourceFilename = isResource ? file.getName() : null;
+    }
+
+    private AkkaConfig(String fileContent) {
+        this.file = null;
+        this.fileContent = fileContent;
+        this.resourceFilename = null;
+    }
+
+
+    @Override
+    public String toString() {
+        return "AkkaConfig [filename=" + file + ", cluserConfig=" + cluserConfig + "]";
+    }
+
+    private void loadFromFile() throws Exception {
+        Config cfg = null;
+        if (this.file != null) {
+            cfg = ConfigFactory.parseFile(this.file);
+        } else if (this.fileContent != null) {
+            cfg = ConfigFactory.parseString(this.fileContent);
+        } else if (this.resourceFilename != null) {
+            cfg = ConfigFactory.parseResources(this.getClass(), this.resourceFilename);
+        }
+
+        if (cfg != null) {
+            this.cluserConfig =
+                    new ClusterConfig(cfg.getConfig("odl-cluster-data").getConfig("akka").getConfig("cluster"));
+        } else {
+            LOG.warn("unable to parse config file");
+            this.cluserConfig = null;
+        }
+    }
+
+    public boolean isCluster() {
+        return this.cluserConfig != null ? this.cluserConfig.isCluster() : false;
+    }
+
+    public static AkkaConfig load() throws Exception {
+        return load(DEFAULT_FILENAME);
+    }
+
+    public static AkkaConfig load(String filename) throws Exception {
+        return load(filename, false);
+    }
+
+    public static AkkaConfig load(String filename, boolean isResource) throws Exception {
+        AkkaConfig cfg = new AkkaConfig(new File(filename), isResource);
+        cfg.loadFromFile();
+
+        return cfg;
+    }
+
+    public static AkkaConfig loadContent(String content) throws Exception {
+        AkkaConfig cfg = new AkkaConfig(content);
+        cfg.loadFromFile();
+
+        return cfg;
+    }
+
+
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/RateFilter.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/RateFilter.java
new file mode 100644
index 000000000..5f3a5af2c
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/RateFilter.java
@@ -0,0 +1,138 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : ccsdk features
+ * ================================================================================
+ * Copyright (C) 2020 highstreet technologies GmbH Intellectual Property.
+ * All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils;
+
+import java.time.Duration;
+import java.time.Instant;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Problems of to many notifications during mount of thousand of devices:
+ * <ul>
+ * <li>Overload ODLUX with notification flood -> ODLUX App can not control notifications rate
+ * <li>Notification processing blocks user -> App design with notifications popups
+ * </ul>
+ * Rate filter
+ * <ul>
+ * <li>Do not use a thread -> Do nothing if there are no notifications
+ * <li>Parameter1 integrationTime : Measurement or integration time for period
+ * <li>Parameter2 readMaxCount : Specifies event number per interval indicating overload
+ * <li>Start measurement on event received that comes later then
+ * </ul>
+ *
+ * <pre>
+ *  Example (e: Event received, rateMaxCount=3)
+ *         eee                           e  e e e e e  e  e e e e    e         e                e
+ *  ---//--|--------------|-----//-------|--------------|--------------|--------------|---//----|--------------|
+ *         P1             P2             P1             P2             P3             P7        P1
+ *Overload              no             no            yes            yes             no              no
+ *
+ *
+ *Intention to use:
+ *   1. Construct with parameters for WS stream to handle
+ *   2.
+ * </pre>
+ */
+
+public class RateFilter {
+
+    private static final Logger LOG = LoggerFactory.getLogger(RateFilter.class.getName());
+
+    private final Duration integrationTime; // Integration time to measure event rate
+    private final long rateMaxCount; //Rate for dropping packets
+    private Instant timeStampPeriodStart; //Time stamp period beginn
+    private Instant timeStampLastEvent; //Measurement interval
+    private long rateCount; // >0: integration running 0: no integration running
+    private boolean overload; //true means in overload status. Change at end of period only.
+    private GetNow get;
+
+    /**
+     * Allow testing with own timestamp provider
+     */
+    public interface GetNow {
+        Instant now();
+    }
+
+    public RateFilter(Duration integrationTime, long rateMaxCount, GetNow getNowMethod) {
+        this.integrationTime = integrationTime;
+        this.rateMaxCount = rateMaxCount;
+        this.get = getNowMethod;
+        this.timeStampLastEvent = Instant.MIN;
+    }
+
+    public RateFilter(Duration integrationTime, long rateMaxCount) {
+        this(integrationTime, rateMaxCount, () -> Instant.now());
+    }
+
+    public synchronized boolean getOverloadStatus() {
+        return overload;
+    }
+
+    /**
+     * Handle filter on event received
+     */
+    public synchronized void filterEvent() {
+        final Instant now = get.now();
+        final Duration durationSinceLastEvent = Duration.between(timeStampLastEvent, now);
+        this.timeStampLastEvent = now;
+
+        if (durationSinceLastEvent.compareTo(integrationTime) >= 0) {
+            //No measurement. Sync and start with period
+            LOG.debug("Sync");
+            timeStampPeriodStart = now;
+            rateCount = 1; //Reset event count .. is part of the
+        } else {
+            //Within period
+            Duration durationPeriod = Duration.between(timeStampPeriodStart, now);
+            rateCount++;
+            boolean endOfPeriod = durationPeriod.compareTo(integrationTime) >= 0;
+            LOG.debug("Period start{}: now:{} end:{} dur:{} int:{}", timeStampPeriodStart, now, endOfPeriod, durationPeriod, integrationTime);
+            if (endOfPeriod) {
+                //Only if end of Period
+                overload = rateCount > rateMaxCount;
+                LOG.debug("Reset overload {}", overload);
+                timeStampPeriodStart = timeStampPeriodStart.plus(integrationTime);
+                rateCount = 0;
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("RateFilter [integrationTime=");
+        builder.append(integrationTime);
+        builder.append(", rateMaxCount=");
+        builder.append(rateMaxCount);
+        builder.append(", timeStampPeriodStart=");
+        builder.append(timeStampPeriodStart);
+        builder.append(", timeStampLastEvent=");
+        builder.append(timeStampLastEvent);
+        builder.append(", rateCount=");
+        builder.append(rateCount);
+        builder.append(", overload=");
+        builder.append(overload);
+        builder.append("]");
+        return builder.toString();
+    }
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/UserScopes.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/UserScopes.java
new file mode 100644
index 000000000..3969bcb15
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/utils/UserScopes.java
@@ -0,0 +1,56 @@
+/*
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager.utils;
+
+import java.util.List;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.NotificationOutput;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.ReducedSchemaInfo;
+import org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.data.Scope;
+
+public class UserScopes {
+
+    private List<Scope> scopes;
+
+    /**
+     *
+     * @param list array of Strings
+     */
+    public void setScopes(List<Scope> list) {
+        this.scopes = list;
+    }
+
+    public boolean hasScope(NotificationOutput output) {
+        return this.hasScope(output.getNodeId(), output.getType());
+    }
+
+    public boolean hasScope(ReducedSchemaInfo schema) {
+        return this.hasScope(null, schema);
+    }
+
+    public boolean hasScope(String nodeId, ReducedSchemaInfo reducedSchemaInfo) {
+        if (this.scopes == null)
+            return false;
+        for (Scope scope : this.scopes) {
+            if (scope.matches(nodeId, reducedSchemaInfo)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/websocket/SyncWebSocketClient.java b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/websocket/SyncWebSocketClient.java
new file mode 100644
index 000000000..c9177205b
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/java/org/onap/ccsdk/features/sdnr/wt/websocketmanager/websocket/SyncWebSocketClient.java
@@ -0,0 +1,120 @@
+/*
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH Intellectual Property. All rights reserved.
+ * =================================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ * ============LICENSE_END==========================================================================
+ */
+package org.onap.ccsdk.features.sdnr.wt.websocketmanager.websocket;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.List;
+import org.java_websocket.client.WebSocketClient;
+import org.java_websocket.handshake.ServerHandshake;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SyncWebSocketClient extends WebSocketClient {
+
+    public interface WebsocketEventHandler {
+        void onMessageReceived(String message);
+
+        void onOpen(ServerHandshake arg0);
+
+        void onClose(int arg0, String arg1, boolean arg2);
+
+        void onError(Exception e);
+    }
+
+    private static final Logger LOG = LoggerFactory.getLogger(SyncWebSocketClient.class.getName());
+    private String messageToSend;
+    private final List<WebsocketEventHandler> handlers;
+
+    public SyncWebSocketClient(URI serverUri) {
+        super(serverUri);
+        this.handlers = new ArrayList<WebsocketEventHandler>();
+    }
+
+    public SyncWebSocketClient(String uri) throws URISyntaxException {
+        this(new URI(uri));
+    }
+
+    public void addEventHandler(WebsocketEventHandler h) {
+        this.handlers.add(h);
+    }
+
+    public void removeEventHandler(WebsocketEventHandler h) {
+        this.handlers.remove(h);
+    }
+
+    @Override
+    public void onClose(int arg0, String arg1, boolean arg2) {
+        LOG.debug("socket closed: {} {} {}", arg0, arg1, arg2);
+        for (WebsocketEventHandler h : this.handlers) {
+            h.onClose(arg0, arg1, arg2);
+        }
+    }
+
+    @Override
+    public void onError(Exception arg0) {
+        LOG.warn("error on socket: {}", arg0.getMessage());
+        for (WebsocketEventHandler h : this.handlers) {
+            h.onError(arg0);
+        }
+    }
+
+    @Override
+    public void onMessage(String arg0) {
+        LOG.debug("received message: {}", arg0);
+        for (WebsocketEventHandler h : this.handlers) {
+            h.onMessageReceived(arg0);
+        }
+    }
+
+    @Override
+    public void onOpen(ServerHandshake arg0) {
+        LOG.debug("socket opened");
+        if (this.messageToSend != null) {
+            LOG.debug("try to send: " + this.messageToSend);
+            this.send(this.messageToSend);
+            this.messageToSend = null;
+        }
+        for (WebsocketEventHandler h : this.handlers) {
+            h.onOpen(arg0);
+        }
+    }
+
+    public void openAndSendAsync(String message) {
+        this.messageToSend = message;
+        this.connect();
+    }
+
+    public void openAndSendAndCloseSync(String message) {
+        try {
+            this.connectBlocking();
+        } catch (InterruptedException e) {
+            LOG.warn("problem connecting:" + e.getMessage());
+            Thread.currentThread().interrupt();
+        }
+        this.send(message);
+        try {
+            this.closeBlocking();
+        } catch (InterruptedException e) {
+            LOG.warn("problem disconnecting:" + e.getMessage());
+            Thread.currentThread().interrupt();
+        }
+    }
+
+}
diff --git a/sdnr/wt/websocketmanager/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml b/sdnr/wt/websocketmanager/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml
new file mode 100644
index 000000000..e3b36e3fe
--- /dev/null
+++ b/sdnr/wt/websocketmanager/provider/src/main/resources/org/opendaylight/blueprint/impl-blueprint.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ============LICENSE_START=======================================================
+  ~ ONAP : ccsdk features
+  ~ ================================================================================
+  ~ Copyright (C) 2019 highstreet technologies GmbH Intellectual Property.
+  ~ All rights reserved.
+  ~ ================================================================================
+  ~ Update Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=======================================================
+  ~
+  -->
+
+<blueprint xmlns:odl="http://opendaylight.org/xmlns/blueprint/v1.0.0"
+           xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
+           odl:use-default-for-reference-types="true">
+
+    <bean id="provider" class="org.onap.ccsdk.features.sdnr.wt.websocketmanager.WebSocketManagerProvider" init-method="init" destroy-method="close">
+    </bean>
+
+    <reference id="onBindService" availability="mandatory" activation="eager" interface="org.osgi.service.http.HttpService">
+        <reference-listener ref="provider" bind-method="onBindService" unbind-method="onUnbindService"/>
+    </reference>
+
+    <service id="registerWebsocketmanagerService"
+             interface="org.onap.ccsdk.features.sdnr.wt.websocketmanager.model.WebsocketManagerService"
+             ref="provider"/>
+
+</blueprint>