summaryrefslogtreecommitdiffstats
path: root/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src
diff options
context:
space:
mode:
authorramverma <ram.krishna.verma@ericsson.com>2018-06-08 11:56:21 +0100
committerramverma <ram.krishna.verma@ericsson.com>2018-06-08 14:07:21 +0100
commit697d02bf4e4188e3040cd987dee97d15f397a35f (patch)
tree08c9f3231c155d33827a5651e1e0263d4b8db8be /plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src
parent9289ac0afefe62f6c8e9cebddb611a8571bf5642 (diff)
Adding plugins-event module to apex-pdp
Adding plugins-event module to apex-pdp Fix a minor bug in TextFileUtils Change-Id: I393c5f5809d078850d6669d22759ba9fa1b4f0e6 Issue-ID: POLICY-862 Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>
Diffstat (limited to 'plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src')
-rw-r--r--plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java233
-rw-r--r--plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java191
-rw-r--r--plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java134
-rw-r--r--plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java28
4 files changed, 586 insertions, 0 deletions
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java
new file mode 100644
index 000000000..b9348d494
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java
@@ -0,0 +1,233 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.apex.core.infrastructure.threading.ApplicationThreadFactory;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.onap.policy.apex.service.engine.event.ApexEventConsumer;
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventReceiver;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.onap.policy.apex.service.engine.event.PeeredReference;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class implements an Apex event consumer that receives events from a REST server.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ApexRestClientConsumer implements ApexEventConsumer, Runnable {
+ // Get a reference to the logger
+ private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientConsumer.class);
+
+ // The amount of time to wait in milliseconds between checks that the consumer thread has stopped
+ private static final long REST_CLIENT_WAIT_SLEEP_TIME = 50;
+
+ // The REST parameters read from the parameter service
+ private RESTClientCarrierTechnologyParameters restConsumerProperties;
+
+ // The event receiver that will receive events from this consumer
+ private ApexEventReceiver eventReceiver;
+
+ // The HTTP client that makes a REST call to get an input event for Apex
+ private Client client;
+
+ // The name for this consumer
+ private String name = null;
+
+ // The peer references for this event handler
+ private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
+
+ // The consumer thread and stopping flag
+ private Thread consumerThread;
+ private boolean stopOrderedFlag = false;
+
+ @Override
+ public void init(final String consumerName, final EventHandlerParameters consumerParameters,
+ final ApexEventReceiver incomingEventReceiver) throws ApexEventException {
+ this.eventReceiver = incomingEventReceiver;
+ this.name = consumerName;
+
+ // Check and get the REST Properties
+ if (!(consumerParameters.getCarrierTechnologyParameters() instanceof RESTClientCarrierTechnologyParameters)) {
+ final String errorMessage =
+ "specified consumer properties are not applicable to REST client consumer (" + this.name + ")";
+ LOGGER.warn(errorMessage);
+ throw new ApexEventException(errorMessage);
+ }
+ restConsumerProperties =
+ (RESTClientCarrierTechnologyParameters) consumerParameters.getCarrierTechnologyParameters();
+
+ // Check if the HTTP method has been set
+ if (restConsumerProperties.getHttpMethod() == null) {
+ restConsumerProperties.setHttpMethod(RESTClientCarrierTechnologyParameters.CONSUMER_HTTP_METHOD);
+ }
+
+ if (!restConsumerProperties.getHttpMethod()
+ .equalsIgnoreCase(RESTClientCarrierTechnologyParameters.CONSUMER_HTTP_METHOD)) {
+ final String errorMessage = "specified HTTP method of \"" + restConsumerProperties.getHttpMethod()
+ + "\" is invalid, only HTTP method \"GET\" is supported for event reception on REST client consumer ("
+ + this.name + ")";
+ LOGGER.warn(errorMessage);
+ throw new ApexEventException(errorMessage);
+ }
+
+ // Initialize the HTTP client
+ client = ClientBuilder.newClient();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#start()
+ */
+ @Override
+ public void start() {
+ // Configure and start the event reception thread
+ final String threadName = this.getClass().getName() + ":" + this.name;
+ consumerThread = new ApplicationThreadFactory(threadName).newThread(this);
+ consumerThread.setDaemon(true);
+ consumerThread.start();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getName()
+ */
+ @Override
+ public String getName() {
+ return name;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getPeeredReference(org.onap.policy.apex.service.
+ * parameters. eventhandler.EventHandlerPeeredMode)
+ */
+ @Override
+ public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
+ return peerReferenceMap.get(peeredMode);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#setPeeredReference(org.onap.policy.apex.service.
+ * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
+ */
+ @Override
+ public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
+ peerReferenceMap.put(peeredMode, peeredReference);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Runnable#run()
+ */
+ @Override
+ public void run() {
+ // The RequestRunner thread runs the get request for the event
+ Thread requestRunnerThread = null;
+
+ // The endless loop that receives events using REST calls
+ while (consumerThread.isAlive() && !stopOrderedFlag) {
+ // Create a new request if one is not in progress
+ if (requestRunnerThread == null || !requestRunnerThread.isAlive()) {
+ requestRunnerThread = new Thread(new RequestRunner());
+ requestRunnerThread.start();
+ }
+
+ ThreadUtilities.sleep(REST_CLIENT_WAIT_SLEEP_TIME);
+ }
+
+ client.close();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.apps.uservice.producer.ApexEventConsumer#stop()
+ */
+ @Override
+ public void stop() {
+ stopOrderedFlag = true;
+
+ while (consumerThread.isAlive()) {
+ ThreadUtilities.sleep(REST_CLIENT_WAIT_SLEEP_TIME);
+ }
+ }
+
+ /**
+ * This class is used to start a thread for each request issued.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+ private class RequestRunner implements Runnable {
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Runnable#run()
+ */
+ @Override
+ public void run() {
+ try {
+ final Response response =
+ client.target(restConsumerProperties.getURL()).request("application/json").get();
+
+ // Check that the event request worked
+ if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+ final String errorMessage = "reception of event from URL \"" + restConsumerProperties.getURL()
+ + "\" failed with status code " + response.getStatus() + " and message \""
+ + response.readEntity(String.class) + "\"";
+ throw new ApexEventRuntimeException(errorMessage);
+ }
+
+ // Get the event we received
+ final String eventJSONString = response.readEntity(String.class);
+
+ // Check there is content
+ if (eventJSONString == null || eventJSONString.trim().length() == 0) {
+ final String errorMessage =
+ "received an empty event from URL \"" + restConsumerProperties.getURL() + "\"";
+ throw new ApexEventRuntimeException(errorMessage);
+ }
+
+ // Send the event into Apex
+ eventReceiver.receiveEvent(eventJSONString);
+ } catch (final Exception e) {
+ LOGGER.warn("error receiving events on thread {}", consumerThread.getName(), e);
+ }
+ }
+ }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java
new file mode 100644
index 000000000..9d838f55e
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java
@@ -0,0 +1,191 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventProducer;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.onap.policy.apex.service.engine.event.PeeredReference;
+import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Concrete implementation of an Apex event producer that sends events using REST.
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ *
+ */
+public class ApexRestClientProducer implements ApexEventProducer {
+ private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientProducer.class);
+
+ // The HTTP client that makes a REST call with an event from Apex
+ private Client client;
+
+ // The REST carrier properties
+ private RESTClientCarrierTechnologyParameters restProducerProperties;
+
+ // The name for this producer
+ private String name = null;
+
+ // The peer references for this event handler
+ private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#init(java.lang.String,
+ * org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters)
+ */
+ @Override
+ public void init(final String producerName, final EventHandlerParameters producerParameters)
+ throws ApexEventException {
+ this.name = producerName;
+
+ // Check and get the REST Properties
+ if (!(producerParameters.getCarrierTechnologyParameters() instanceof RESTClientCarrierTechnologyParameters)) {
+ final String errorMessage =
+ "specified consumer properties are not applicable to REST client producer (" + this.name + ")";
+ LOGGER.warn(errorMessage);
+ throw new ApexEventException(errorMessage);
+ }
+ restProducerProperties =
+ (RESTClientCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
+
+ // Check if the HTTP method has been set
+ if (restProducerProperties.getHttpMethod() == null) {
+ restProducerProperties.setHttpMethod(RESTClientCarrierTechnologyParameters.DEFAULT_PRODUCER_HTTP_METHOD);
+ }
+
+ if (!restProducerProperties.getHttpMethod().equalsIgnoreCase("POST")
+ && !restProducerProperties.getHttpMethod().equalsIgnoreCase("PUT")) {
+ final String errorMessage = "specified HTTP method of \"" + restProducerProperties.getHttpMethod()
+ + "\" is invalid, only HTTP methods \"POST\" and \"PUT\" are supproted for event sending on REST client producer ("
+ + this.name + ")";
+ LOGGER.warn(errorMessage);
+ throw new ApexEventException(errorMessage);
+ }
+
+ // Initialize the HTTP client
+ client = ClientBuilder.newClient();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName()
+ */
+ @Override
+ public String getName() {
+ return name;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap.policy.apex.service.
+ * parameters. eventhandler.EventHandlerPeeredMode)
+ */
+ @Override
+ public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
+ return peerReferenceMap.get(peeredMode);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap.policy.apex.service.
+ * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
+ */
+ @Override
+ public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
+ peerReferenceMap.put(peeredMode, peeredReference);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#sendEvent(long, java.lang. String,
+ * java.lang.Object)
+ */
+ @Override
+ public void sendEvent(final long executionId, final String eventName, final Object event) {
+ // Check if this is a synchronized event, if so we have received a reply
+ final SynchronousEventCache synchronousEventCache =
+ (SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS);
+ if (synchronousEventCache != null) {
+ synchronousEventCache.removeCachedEventToApexIfExists(executionId);
+ }
+
+ // Send the event as a REST request
+ final Response response = sendEventAsRESTRequest((String) event);
+
+ // Check that the request worked
+ if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+ final String errorMessage = "send of event to URL \"" + restProducerProperties.getURL() + "\" using HTTP \""
+ + restProducerProperties.getHttpMethod() + "\" failed with status code " + response.getStatus()
+ + " and message \"" + response.readEntity(String.class) + "\", event:\n" + event;
+ LOGGER.warn(errorMessage);
+ throw new ApexEventRuntimeException(errorMessage);
+ }
+
+ if (LOGGER.isTraceEnabled()) {
+ LOGGER.trace("event sent from engine using {} to URL {} with HTTP {} : {} and response {} ", this.name,
+ restProducerProperties.getURL(), restProducerProperties.getHttpMethod(), event, response);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#stop()
+ */
+ @Override
+ public void stop() {
+ // Close the HTTP session
+ client.close();
+ }
+
+ /**
+ * Send the event as a JSON string as a REST request.
+ *
+ * @param event the event to send
+ * @return the response tot he JSON request
+ */
+ public Response sendEventAsRESTRequest(final String event) {
+ // We have already checked that it is a PUT or POST request
+ if (restProducerProperties.getHttpMethod().equalsIgnoreCase("POST")) {
+ return client.target(restProducerProperties.getURL()).request("application/json").post(Entity.json(event));
+ } else {
+ return client.target(restProducerProperties.getURL()).request("application/json").put(Entity.json(event));
+ }
+ }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java
new file mode 100644
index 000000000..e07593c55
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java
@@ -0,0 +1,134 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import org.onap.policy.apex.service.parameters.carriertechnology.CarrierTechnologyParameters;
+
+/**
+ * Apex parameters for REST as an event carrier technology with Apex as a REST client.
+ *
+ * The parameters for this plugin are:
+ * <ol>
+ * <li>url: The URL that the Apex Rest client will connect to over REST for event reception or event sending. This
+ * parameter is mandatory.
+ * <li>httpMethod: The HTTP method to use when sending events over REST, legal values are POST (default) and PUT. When
+ * receiving events, the REST client plugin always uses the HTTP GET method.
+ * </ol>
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ */
+public class RESTClientCarrierTechnologyParameters extends CarrierTechnologyParameters {
+
+ /** The label of this carrier technology. */
+ public static final String RESTCLIENT_CARRIER_TECHNOLOGY_LABEL = "RESTCLIENT";
+
+ /** The producer plugin class for the REST carrier technology. */
+ public static final String RESTCLIENT_EVENT_PRODUCER_PLUGIN_CLASS = ApexRestClientProducer.class.getCanonicalName();
+
+ /** The consumer plugin class for the REST carrier technology. */
+ public static final String RESTCLIENT_EVENT_CONSUMER_PLUGIN_CLASS = ApexRestClientConsumer.class.getCanonicalName();
+
+ /** The default HTTP method for output of events. */
+ public static final String DEFAULT_PRODUCER_HTTP_METHOD = "POST";
+
+ /** The HTTP method for input of events. */
+ public static final String CONSUMER_HTTP_METHOD = "GET";
+
+ private String url = null;
+ private String httpMethod = null;
+
+ /**
+ * Constructor to create a REST carrier technology parameters instance and register the instance with the parameter
+ * service.
+ */
+ public RESTClientCarrierTechnologyParameters() {
+ super(RESTClientCarrierTechnologyParameters.class.getCanonicalName());
+
+ // Set the carrier technology properties for the web socket carrier technology
+ this.setLabel(RESTCLIENT_CARRIER_TECHNOLOGY_LABEL);
+ this.setEventProducerPluginClass(RESTCLIENT_EVENT_PRODUCER_PLUGIN_CLASS);
+ this.setEventConsumerPluginClass(RESTCLIENT_EVENT_CONSUMER_PLUGIN_CLASS);
+
+ }
+
+ /**
+ * Gets the URL for the REST request.
+ *
+ * @return the URL
+ */
+ public String getURL() {
+ return url;
+ }
+
+ /**
+ * Sets the URL for the REST request.
+ *
+ * @param incomingURL the URL
+ */
+ public void setURL(final String incomingURL) {
+ this.url = incomingURL;
+ }
+
+ /**
+ * Gets the HTTP method to use for the REST request.
+ *
+ * @return the HTTP method
+ */
+ public String getHttpMethod() {
+ return httpMethod;
+ }
+
+ /**
+ * Sets the HTTP method to use for the REST request.
+ *
+ * @param httpMethod the HTTP method
+ */
+ public void setHttpMethod(final String httpMethod) {
+ this.httpMethod = httpMethod;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "RESTClientCarrierTechnologyParameters [url=" + url + ", httpMethod=" + httpMethod + "]";
+ }
+
+
+ /*
+ *
+ * @see org.onap.policy.apex.apps.uservice.parameters.ApexParameterValidator#validate()
+ */
+ @Override
+ public String validate() {
+ final StringBuilder errorMessageBuilder = new StringBuilder();
+
+ // Check if the URL has been set for event output
+ if (getURL() == null) {
+ errorMessageBuilder.append(" no URL has been set for event sending on REST client");
+ }
+
+ return errorMessageBuilder.toString();
+ }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java
new file mode 100644
index 000000000..e674beef6
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * APEX REST consumer and producer plugins when APEX is acting as a REST client.
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ *
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;