diff options
author | 2019-05-30 22:23:52 +0000 | |
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committer | 2019-06-17 15:31:38 +0000 | |
commit | d14bb405004176e72e8722438eb95819ed11f1c7 (patch) | |
tree | b99fb91f96bf55fa8d02823a3baae90bc3325797 /message-router/consumer/provider/src | |
parent | faaa1a75d85a522847acf4c7250b8da5f076cfa0 (diff) |
implement message router consumer
implement message router consumer
Issue-ID: CCSDK-1373
Signed-off-by: Smokowski, Kevin (ks6305) <kevin.smokowski@att.com>
Change-Id: Iea4290c5b9e9bb63f152f0605dae1e715974f217
Diffstat (limited to 'message-router/consumer/provider/src')
4 files changed, 503 insertions, 0 deletions
diff --git a/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/AbstractBaseConsumer.java b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/AbstractBaseConsumer.java new file mode 100755 index 00000000..8937f7b9 --- /dev/null +++ b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/AbstractBaseConsumer.java @@ -0,0 +1,207 @@ +/*- + * ============LICENSE_START======================================================= + * openECOMP : SDN-C + * ================================================================================ + * Copyright (C) 2017 - 2018 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========================================================= + */ + +package org.onap.ccsdk.sli.adaptors.messagerouter.consumer.provider.impl; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.net.HttpURLConnection; +import java.net.MalformedURLException; +import java.net.URL; +import java.util.Base64; + +import javax.net.ssl.HostnameVerifier; +import javax.net.ssl.HttpsURLConnection; +import javax.net.ssl.SSLSession; + +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.ConsumerApi; +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.RequestHandler; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.gson.Gson; +import com.google.gson.JsonParseException; + +/* + * java.net based client to build message router consumers + */ +public abstract class AbstractBaseConsumer implements ConsumerApi { + private static final Logger LOG = LoggerFactory.getLogger(AbstractBaseConsumer.class); + private static final String REQUEST_METHOD = "GET"; + + private final String host; + private final Integer connectTimeout; + private final Integer readTimeout; + private final String group; + private final String id; + private final String filter; + private final Integer limit; + private final Integer timeoutQueryParamValue; + private final String authorizationString; + + protected RequestHandler requestHandler; + protected URL url; + protected String topic; + + public AbstractBaseConsumer(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) { + this.host = host; + this.connectTimeout = connectTimeout; + this.readTimeout = readTimeout; + this.group = group; + this.id = id; + this.filter = filter; + this.limit = limit; + this.timeoutQueryParamValue = timeoutQueryParamValue; + + if ("basic".equals(authentication)) { + if (username != null && password != null && username.length() > 0 && password.length() > 0) { + authorizationString = buildAuthorizationString(username, password); + } else { + throw new IllegalStateException("Authentication is set to basic but username or password is missing"); + } + } else if ("noauth".equals(authentication)) { + authorizationString = null; + } else { + throw new IllegalStateException("Unknown authentication method: " + authentication); + } + } + + protected void poll() { + String responseBody = performHttpOperation(); + if (responseBody != null && !responseBody.startsWith("[]")) { + LOG.info("New message was fetched from MessageRouter."); + LOG.trace("Fetched message is\n{}", responseBody); + try { + String[] requests = new Gson().fromJson(responseBody, String[].class); + if (requests != null) { + for (String request : requests) { + if (request != null) { + requestHandler.handleRequest(topic,request); + } + } + } else { + LOG.warn("Deserialization of received message results in null array.", responseBody); + } + } catch (JsonParseException e) { + LOG.warn("Received message has bad format. Expected format is JSON."); + } + } else { + LOG.trace("No new message was fetched from MessageRouter."); + } + } + + private String buildlUrlString(String topic) { + StringBuilder sb = new StringBuilder(); + sb.append(host + "/events/" + topic + "/" + group + "/" + id); + sb.append("?timeout=" + timeoutQueryParamValue); + + if (limit != null) { + sb.append("&limit=" + limit); + } + if (filter != null) { + sb.append("&filter=" + filter); + } + return sb.toString(); + } + + private String performHttpOperation() { + HttpURLConnection httpUrlConnection = null; + try { + httpUrlConnection = buildHttpURLConnection(url); + httpUrlConnection.setRequestMethod(REQUEST_METHOD); + httpUrlConnection.connect(); + int status = httpUrlConnection.getResponseCode(); + if (status < 300) { + return readFromStream(httpUrlConnection.getInputStream()); + } else { + String response = readFromStream(httpUrlConnection.getErrorStream()); + LOG.warn("Fetching message from MessageRouter on url {} failed with http status {}. Error message is\n{}.", url, status, response); + } + } catch (Exception e) { + LOG.warn("Exception was thrown during fetching message from MessageRouter on url {}.", url, e); + } finally { + if (httpUrlConnection != null) { + httpUrlConnection.disconnect(); + } + } + return null; + } + + private String buildAuthorizationString(String userName, String password) { + String basicAuthString = userName + ":" + password; + basicAuthString = Base64.getEncoder().encodeToString(basicAuthString.getBytes()); + return "Basic " + basicAuthString; + } + + protected HttpURLConnection buildHttpURLConnection(URL url) throws IOException { + HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection(); + if (authorizationString != null) { + httpUrlConnection.setRequestProperty("Authorization", authorizationString); + } + httpUrlConnection.setRequestProperty("Accept", "application/json"); + httpUrlConnection.setUseCaches(false); + httpUrlConnection.setConnectTimeout(connectTimeout); + httpUrlConnection.setReadTimeout(readTimeout); + + // ignore hostname errors when dealing with HTTPS connections + if (httpUrlConnection instanceof HttpsURLConnection) { + HttpsURLConnection conn = (HttpsURLConnection) httpUrlConnection; + conn.setHostnameVerifier(new HostnameVerifier() { + @Override + public boolean verify(String arg0, SSLSession arg1) { + return true; + } + }); + } + return httpUrlConnection; + } + + protected String readFromStream(InputStream stream) throws IOException { + BufferedReader br = new BufferedReader(new InputStreamReader(stream)); + StringBuilder sb = new StringBuilder(); + String line; + while ((line = br.readLine()) != null) { + sb.append(line); + sb.append("\n"); + } + br.close(); + return sb.toString(); + } + + @Override + public void registerHandler(String topic, RequestHandler requestHandler) { + this.topic = topic; + try { + this.url = new URL(buildlUrlString(topic)); + } catch (MalformedURLException e) { + LOG.error("Topic " + topic + " resulted in MalformedURLException", e); + } + this.requestHandler = requestHandler; + } + + @Override + public void close() throws Exception { + //BaseConsumer doesn't spawn any threads + } + +} diff --git a/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/ConsumerFactory.java b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/ConsumerFactory.java new file mode 100755 index 00000000..051380e1 --- /dev/null +++ b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/ConsumerFactory.java @@ -0,0 +1,179 @@ +package org.onap.ccsdk.sli.adaptors.messagerouter.consumer.provider.impl;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Properties;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ConsumerFactory {
+ private static final Logger LOG = LoggerFactory.getLogger(ConsumerFactory.class);
+
+ // Default values to minimize required configuration
+ private static final int DEFAULT_FETCH_PAUSE = 5000;
+ private static final int DEFAULT_CONNECT_TIMEOUT = 30000;
+ private static final int DEFAULT_READ_TIMEOUT = 180000;
+ private static final int DEFAULT_LIMIT = 5; // Limits the number of messages pulled in a single GET request
+ private static final int DEFAULT_TIMEOUT_QUERY_PARAM_VALUE = 15000;
+ private static final String DEFAULT_AUTH_METHOD = "basic";
+
+ // Required properties
+ protected final String username;
+ protected final String password;
+ protected final String host;
+ private final String group;
+ private final String id;
+
+ // Optional properties
+ protected Integer connectTimeout;
+ protected Integer readTimeout;
+ private Integer fetchPause;
+ private Integer limit;
+ private Integer timeoutQueryParamValue;
+ private String filter;
+ protected String auth;
+
+ public String getAuth() {
+ return auth;
+ }
+
+ public void setAuth(String auth) {
+ this.auth = auth;
+ }
+
+ public Integer getConnectTimeout() {
+ return connectTimeout;
+ }
+
+ public void setConnectTimeout(Integer connectTimeout) {
+ this.connectTimeout = connectTimeout;
+ }
+
+ public Integer getReadTimeout() {
+ return readTimeout;
+ }
+
+ public void setReadTimeout(Integer readTimeout) {
+ this.readTimeout = readTimeout;
+ }
+
+ public Integer getFetchPause() {
+ return fetchPause;
+ }
+
+ public void setFetchPause(Integer fetchPause) {
+ this.fetchPause = fetchPause;
+ }
+
+ public Integer getLimit() {
+ return limit;
+ }
+
+ public void setLimit(Integer limit) {
+ this.limit = limit;
+ }
+
+ public Integer getTimeoutQueryParamValue() {
+ return timeoutQueryParamValue;
+ }
+
+ public void setTimeoutQueryParamValue(Integer timeoutQueryParamValue) {
+ this.timeoutQueryParamValue = timeoutQueryParamValue;
+ }
+
+ public String getFilter() {
+ return filter;
+ }
+
+ public void setFilter(String filter) {
+ processFilter(filter);
+ }
+
+ public ConsumerFactory(String username, String password, String host, String group, String id, Integer connectTimeout, Integer readTimeout) {
+ this.username = username;
+ this.password = password;
+ this.host = host;
+ this.group = group;
+ this.id = id;
+ setDefaults();
+ }
+
+ public ConsumerFactory(Properties properties) {
+ // Required properties
+ username = properties.getProperty("username");
+ password = properties.getProperty("password");
+ host = properties.getProperty("host");
+ auth = properties.getProperty("auth");
+ group = properties.getProperty("group");
+ id = properties.getProperty("id");
+
+ // Optional properties
+ connectTimeout = readOptionalInteger(properties, "connectTimeoutSeconds");
+ readTimeout = readOptionalInteger(properties, "readTimeoutMinutes");
+ fetchPause = readOptionalInteger(properties, "fetchPause");
+ limit = readOptionalInteger(properties, "limit");
+ timeoutQueryParamValue = readOptionalInteger(properties, "timeout");
+ processFilter(properties.getProperty("filter"));
+
+ setDefaults();
+ }
+
+ private Integer readOptionalInteger(Properties properties, String propertyName) {
+ String stringValue = properties.getProperty(propertyName);
+ if (stringValue != null && stringValue.length() > 0) {
+ try {
+ return Integer.valueOf(stringValue);
+ } catch (NumberFormatException e) {
+ LOG.error("property " + propertyName + " had the value " + stringValue + " that could not be converted to an Integer", e);
+ }
+ }
+ return null;
+ }
+
+ public PollingConsumerImpl createPollingClient() {
+ return new PollingConsumerImpl(username, password, host, auth, connectTimeout, readTimeout, fetchPause, group, id, filter, limit, timeoutQueryParamValue);
+ }
+
+ public PullingConsumerImpl createPullingClient() {
+ return new PullingConsumerImpl(username, password, host, auth, connectTimeout, readTimeout, group, id, filter, limit, timeoutQueryParamValue);
+ }
+
+ private void processFilter(String filterString) {
+ if (filterString != null) {
+ if (filterString.length() > 0) {
+ try {
+ filter = URLEncoder.encode(filterString, StandardCharsets.UTF_8.name());
+ } catch (UnsupportedEncodingException e) {
+ LOG.warn("Couldn't encode filter string. Filter will be ignored.", e);
+ filter = null;
+ }
+ } else {
+ filter = null;
+ }
+ }
+ }
+
+ private void setDefaults() {
+ if (connectTimeout == null) {
+ connectTimeout = DEFAULT_CONNECT_TIMEOUT;
+ }
+ if (readTimeout == null) {
+ readTimeout = DEFAULT_READ_TIMEOUT;
+ }
+ if (fetchPause == null) {
+ fetchPause = DEFAULT_FETCH_PAUSE;
+ }
+ if (limit == null) {
+ limit = DEFAULT_LIMIT;
+ }
+ if (timeoutQueryParamValue == null) {
+ timeoutQueryParamValue = DEFAULT_TIMEOUT_QUERY_PARAM_VALUE;
+ }
+ if (auth == null) {
+ auth = DEFAULT_AUTH_METHOD;
+ }
+ }
+
+}
diff --git a/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PollingConsumerImpl.java b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PollingConsumerImpl.java new file mode 100644 index 00000000..263e94ca --- /dev/null +++ b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PollingConsumerImpl.java @@ -0,0 +1,100 @@ +/*- + * ============LICENSE_START======================================================= + * openECOMP : SDN-C + * ================================================================================ + * Copyright (C) 2017 - 2018 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========================================================= + */ + +package org.onap.ccsdk.sli.adaptors.messagerouter.consumer.provider.impl; + +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.PollingConsumer; +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.RequestHandler; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/* + * java.net based client to build message router consumers + */ +public class PollingConsumerImpl implements PollingConsumer { + + //RunnableConsumer is a private inner class so run cannot be called from other code + private class RunnableConsumer extends AbstractBaseConsumer implements Runnable, PollingConsumer { + private final Logger LOG = LoggerFactory.getLogger(PollingConsumerImpl.class); + private volatile Thread t; + private final Integer fetchPause; + + public RunnableConsumer(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, Integer fetchPause, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) { + super(username, password, host, authentication, connectTimeout, readTimeout, group, id, filter, limit, timeoutQueryParamValue); + this.fetchPause = fetchPause; + } + + public void start() { + t = new Thread(this); + t.start(); + LOG.info("ConsumerImpl started. Fetch period is {} ms.", fetchPause); + } + + public void stop() { + t = null; + LOG.info("ConsumerImpl stopped."); + } + + @Override + public void run() { + if (this.url != null) { + Thread thisThread = Thread.currentThread(); + while (t == thisThread) { + poll(); + try { + LOG.trace("Next fetch from MessageRouter url {} after {} milliseconds.", url, fetchPause); + Thread.sleep(fetchPause); + } catch (InterruptedException e) { + LOG.warn("Thread sleep was interrupted.", e); + } + } + } else { + LOG.error("URL is null, can't listen for messages"); + } + } + + @Override + public void close() throws Exception { + stop(); + } + } + + private RunnableConsumer c; + + public PollingConsumerImpl(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, Integer fetchPause, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) { + c = new RunnableConsumer(username, password, host, authentication, connectTimeout, readTimeout, fetchPause, group, id, filter, limit, timeoutQueryParamValue); + } + + @Override + public void start() { + c.start(); + } + + @Override + public void registerHandler(String topic, RequestHandler requestHandler) { + c.registerHandler(topic, requestHandler); + } + + @Override + public void close() throws Exception { + c.close(); + } +} diff --git a/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PullingConsumerImpl.java b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PullingConsumerImpl.java new file mode 100755 index 00000000..b3f0aef4 --- /dev/null +++ b/message-router/consumer/provider/src/main/java/org/onap/ccsdk/sli/adaptors/messagerouter/consumer/provider/impl/PullingConsumerImpl.java @@ -0,0 +1,17 @@ +package org.onap.ccsdk.sli.adaptors.messagerouter.consumer.provider.impl; + +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.PullingConsumer; +import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.RequestHandler; + +public class PullingConsumerImpl extends AbstractBaseConsumer implements PullingConsumer { + + public PullingConsumerImpl(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) { + super(username, password, host, authentication, connectTimeout, readTimeout, group, id, filter, limit, timeoutQueryParamValue); + } + + @Override + public void pull() { + this.poll(); + } + +} |