Support HTTP headers in REST Client

Fixed REST client plugin to supprot HTTP headers and add unit
test to plugin.

Change-Id: I6a71ab7f83ed2126b8600bb5e586f971dbdacdc0
Issue-ID: POLICY-1222
Signed-off-by: liamfallon <liam.fallon@est.tech>

4 files changed, 894 insertions, 0 deletions

diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java
new file mode 100644
index 000000000..1498678e9
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java
@@ -0,0 +1,338 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.Invocation.Builder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.Response;
+
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+
+/**
+ * This class tests the ApexRestClientConusmer class.
+ *
+ */
+public class ApexRestClientConusmerTest {
+    private final PrintStream stdout = System.out;
+
+    @Mock
+    private Client httpClientMock;
+
+    @Mock
+    private WebTarget targetMock;
+
+    @Mock
+    private Builder builderMock;
+
+    @Mock
+    private Response responseMock;
+
+    @Test
+    public void testApexRestClientConusmerErrors() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientConsumer arcc = new ApexRestClientConsumer();
+        assertNotNull(arcc);
+
+        EventHandlerParameters consumerParameters = new EventHandlerParameters();
+        SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            fail("test should throw an exception here");
+        } catch (ApexEventException e) {
+            assertEquals(
+                "specified consumer properties are not applicable to REST client consumer (RestClientConsumer)",
+                e.getMessage());
+        }
+
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        consumerParameters.setCarrierTechnologyParameters(rcctp);
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.DELETE);
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+            fail("test should throw an exception here");
+        } catch (ApexEventException e) {
+            assertEquals("specified HTTP method of \"DELETE\" is invalid, only HTTP method \"GET\" is supported "
+                + "for event reception on REST client consumer (RestClientConsumer)", e.getMessage());
+        }
+
+        rcctp.setHttpMethod(null);
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcc.getName());
+
+            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.BAD_REQUEST.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).get();
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcc.setClient(httpClientMock);
+
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals(0, incomingEventReceiver.getEventCount());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals(0, incomingEventReceiver.getEventCount());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testApexRestClientConusmerHttpError() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientConsumer arcc = new ApexRestClientConsumer();
+        assertNotNull(arcc);
+
+        EventHandlerParameters consumerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        consumerParameters.setCarrierTechnologyParameters(rcctp);
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
+        
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcc.getName());
+
+            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        Mockito.doReturn(Response.Status.BAD_REQUEST.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).get();
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcc.setClient(httpClientMock);
+
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(outContent));
+
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals(0, incomingEventReceiver.getEventCount());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+
+        final String outString = outContent.toString();
+        System.setOut(stdout);
+        
+        assertTrue(outString.contains(
+            "reception of event from URL \"http://some.place.that.does.not/exist\" failed with status code 400"));
+    }
+
+    @Test
+    public void testApexRestClientConusmerJsonError() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientConsumer arcc = new ApexRestClientConsumer();
+        assertNotNull(arcc);
+
+        EventHandlerParameters consumerParameters = new EventHandlerParameters();
+        SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        consumerParameters.setCarrierTechnologyParameters(rcctp);
+
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcc.getName());
+
+            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).get();
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcc.setClient(httpClientMock);
+
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(outContent));
+
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals(0, incomingEventReceiver.getEventCount());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+        
+        final String outString = outContent.toString();
+        System.setOut(stdout);
+        
+        assertTrue(outString.contains(
+            "received an empty event from URL \"http://some.place.that.does.not/exist\""));
+    }
+
+    @Test
+    public void testApexRestClientConusmerJsonEmpty() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientConsumer arcc = new ApexRestClientConsumer();
+        assertNotNull(arcc);
+
+        EventHandlerParameters consumerParameters = new EventHandlerParameters();
+        SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        consumerParameters.setCarrierTechnologyParameters(rcctp);
+
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcc.getName());
+
+            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn("").when(responseMock).readEntity(String.class);
+        Mockito.doReturn(responseMock).when(builderMock).get();
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcc.setClient(httpClientMock);
+
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(outContent));
+
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals(0, incomingEventReceiver.getEventCount());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+        
+        final String outString = outContent.toString();
+        System.setOut(stdout);
+        
+        assertTrue(outString.contains(
+            "received an empty event from URL \"http://some.place.that.does.not/exist\""));
+    }
+
+    @Test
+    public void testApexRestClientConusmerJsonOk() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientConsumer arcc = new ApexRestClientConsumer();
+        assertNotNull(arcc);
+
+        EventHandlerParameters consumerParameters = new EventHandlerParameters();
+        SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        consumerParameters.setCarrierTechnologyParameters(rcctp);
+
+        try {
+            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcc.getName());
+
+            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn("This is an event").when(responseMock).readEntity(String.class);
+        Mockito.doReturn(responseMock).when(builderMock).get();
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcc.setClient(httpClientMock);
+
+        try {
+            // We have not set the URL, this test should not receive any events
+            arcc.start();
+            ThreadUtilities.sleep(200);
+            arcc.stop();
+
+            assertEquals("This is an event", incomingEventReceiver.getLastEvent());
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java
new file mode 100644
index 000000000..3ef172427
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java
@@ -0,0 +1,337 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import ch.qos.logback.classic.Level;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.Invocation.Builder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.Response;
+
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+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.SynchronousEventCache;
+import org.onap.policy.apex.service.engine.event.impl.filecarrierplugin.consumer.ApexFileEventConsumer;
+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;
+
+/**
+ * Test the ApexRestClientProducer class.
+ *
+ */
+public class ApexRestClientProducerTest {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientProducer.class);
+
+    @Mock
+    private Client httpClientMock;
+
+    @Mock
+    private WebTarget targetMock;
+
+    @Mock
+    private Builder builderMock;
+
+    @Mock
+    private Response responseMock;
+
+    @Test
+    public void testApexRestClientProducerErrors() {
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        try {
+            arcp.init("RestClientProducer", producerParameters);
+            fail("test should throw an exception here");
+        } catch (ApexEventException e) {
+            assertEquals(
+                "specified producer properties are not applicable to REST client producer (RestClientProducer)",
+                e.getMessage());
+        }
+
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.DELETE);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+            fail("test should throw an exception here");
+        } catch (ApexEventException e) {
+            assertEquals("specified HTTP method of \"DELETE\" is invalid, only HTTP methods \"POST\" and \"PUT\" "
+                + "are supproted for event sending on REST client producer (RestClientConsumer)", e.getMessage());
+        }
+
+        rcctp.setHttpMethod(null);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+
+            arcp.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcp.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+
+            arcp.stop();
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.POST);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+
+            arcp.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcp.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+
+            arcp.stop();
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.PUT);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.PUT, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+
+            arcp.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+            assertEquals(null, arcp.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+
+            arcp.stop();
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testApexRestClientProducerPutEvent() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.PUT);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.PUT, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).put(Mockito.any());
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcp.setClient(httpClientMock);
+
+        try {
+            arcp.sendEvent(123, "EventName", "This is an Event");
+            arcp.stop();
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testApexRestClientProducerPostEvent() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.POST);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).post(Mockito.any());
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcp.setClient(httpClientMock);
+
+        try {
+            arcp.sendEvent(123, "EventName", "This is an Event");
+            arcp.stop();
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testApexRestClientProducerPostEventCache() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.POST);
+
+        ApexEventConsumer consumer = new ApexFileEventConsumer();
+        SynchronousEventCache cache = new SynchronousEventCache(EventHandlerPeeredMode.SYNCHRONOUS, consumer, arcp,
+            1000);
+        arcp.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, cache);
+        assertEquals(cache, arcp.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).post(Mockito.any());
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcp.setClient(httpClientMock);
+
+        try {
+            arcp.sendEvent(123, "EventName", "This is an Event");
+            arcp.stop();
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+
+    @Test
+    public void testApexRestClientProducerPostEventCacheTrace() {
+        MockitoAnnotations.initMocks(this);
+
+        ch.qos.logback.classic.Logger classicLogger = (ch.qos.logback.classic.Logger) LOGGER;
+        classicLogger.setLevel(Level.TRACE);
+        
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.POST);
+
+        ApexEventConsumer consumer = new ApexFileEventConsumer();
+        SynchronousEventCache cache = new SynchronousEventCache(EventHandlerPeeredMode.SYNCHRONOUS, consumer, arcp,
+            1000);
+        arcp.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, cache);
+        assertEquals(cache, arcp.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).post(Mockito.any());
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcp.setClient(httpClientMock);
+
+        try {
+            arcp.sendEvent(123, "EventName", "This is an Event");
+            arcp.stop();
+        } catch (Exception e) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testApexRestClientProducerHttpError() {
+        MockitoAnnotations.initMocks(this);
+
+        ApexRestClientProducer arcp = new ApexRestClientProducer();
+        assertNotNull(arcp);
+
+        EventHandlerParameters producerParameters = new EventHandlerParameters();
+        RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
+        producerParameters.setCarrierTechnologyParameters(rcctp);
+
+        rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.POST);
+        try {
+            arcp.init("RestClientConsumer", producerParameters);
+            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
+
+            assertEquals("RestClientConsumer", arcp.getName());
+        } catch (ApexEventException e) {
+            fail("test should not throw an exception");
+        }
+
+        rcctp.setUrl("http://some.place.that.does.not/exist");
+        Mockito.doReturn(Response.Status.BAD_REQUEST.getStatusCode()).when(responseMock).getStatus();
+        Mockito.doReturn(responseMock).when(builderMock).post(Mockito.any());
+        Mockito.doReturn(builderMock).when(targetMock).request("application/json");
+        Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
+        arcp.setClient(httpClientMock);
+
+        try {
+            arcp.sendEvent(123, "EventName", "This is an Event");
+            fail("test should throw an exception here");
+        } catch (Exception e) {
+            assertEquals(
+                "send of event to URL \"http://some.place.that.does.not/exist\" using HTTP \"POST\" "
+                    + "failed with status code 400 and message \"null\", event:\n" + "This is an Event",
+                e.getMessage());
+        }
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
new file mode 100644
index 000000000..3d0c9b73f
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
@@ -0,0 +1,149 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.onap.policy.apex.service.engine.main.ApexCommandLineArguments;
+import org.onap.policy.apex.service.parameters.ApexParameterHandler;
+import org.onap.policy.apex.service.parameters.ApexParameters;
+import org.onap.policy.common.parameters.ParameterException;
+
+/**
+ * Test REST Requestor carrier technology parameters.
+ */
+public class RestClientCarrierTechnologyParametersTest {
+
+    @Test
+    public void testRestClientCarrierTechnologyParametersBadList() {
+        ApexCommandLineArguments arguments = new ApexCommandLineArguments();
+        arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderBadList.json");
+        arguments.setRelativeFileRoot(".");
+
+        try {
+            new ApexParameterHandler().getParameters(arguments);
+            fail("test should throw an exception here");
+        } catch (ParameterException pe) {
+            assertTrue(pe.getMessage().contains("HTTP header array entry is null\n    parameter"));
+            assertTrue(pe.getMessage().trim().endsWith("HTTP header array entry is null"));
+        }
+    }
+
+    @Test
+    public void testRestClientCarrierTechnologyParametersNotKvPairs() {
+        ApexCommandLineArguments arguments = new ApexCommandLineArguments();
+        arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderNotKvPairs.json");
+        arguments.setRelativeFileRoot(".");
+
+        try {
+            new ApexParameterHandler().getParameters(arguments);
+            fail("test should throw an exception here");
+        } catch (ParameterException pe) {
+            assertTrue(pe.getMessage()
+                            .contains("HTTP header array entries must have one key and one value: [aaa, bbb, ccc]"));
+            assertTrue(pe.getMessage().trim()
+                            .endsWith("HTTP header array entries must have one key and one value: [aaa]"));
+        }
+    }
+
+    @Test
+    public void testRestClientCarrierTechnologyParametersNulls() {
+        ApexCommandLineArguments arguments = new ApexCommandLineArguments();
+        arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderNulls.json");
+        arguments.setRelativeFileRoot(".");
+
+        try {
+            new ApexParameterHandler().getParameters(arguments);
+            fail("test should throw an exception here");
+        } catch (ParameterException pe) {
+            assertTrue(pe.getMessage().contains("HTTP header key is null or blank: [null, bbb]"));
+            assertTrue(pe.getMessage().trim().endsWith("HTTP header value is null or blank: [ccc, null]"));
+        }
+    }
+
+    @Test
+    public void testRestClientCarrierTechnologyParametersOk() {
+        ApexCommandLineArguments arguments = new ApexCommandLineArguments();
+        arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderOK.json");
+        arguments.setRelativeFileRoot(".");
+
+        try {
+            ApexParameters parameters = new ApexParameterHandler().getParameters(arguments);
+
+            RestClientCarrierTechnologyParameters rrctp0 = (RestClientCarrierTechnologyParameters) parameters
+                            .getEventInputParameters().get("RestClientConsumer0").getCarrierTechnologyParameters();
+            assertEquals(0, rrctp0.getHttpHeaders().length);
+
+            RestClientCarrierTechnologyParameters rrctp1 = (RestClientCarrierTechnologyParameters) parameters
+                            .getEventInputParameters().get("RestClientConsumer1").getCarrierTechnologyParameters();
+            assertEquals(3, rrctp1.getHttpHeaders().length);
+            assertEquals("bbb", rrctp1.getHttpHeadersAsMultivaluedMap().get("aaa").get(0));
+            assertEquals("ddd", rrctp1.getHttpHeadersAsMultivaluedMap().get("ccc").get(0));
+            assertEquals("fff", rrctp1.getHttpHeadersAsMultivaluedMap().get("eee").get(0));
+            
+            rrctp1.setHttpHeaders(null);
+            assertEquals(null, rrctp1.getHttpHeadersAsMultivaluedMap());
+        } catch (ParameterException pe) {
+            fail("test should not throw an exception");
+        }
+    }
+
+    @Test
+    public void testGettersAndSetters() {
+        RestClientCarrierTechnologyParameters rrctp = new RestClientCarrierTechnologyParameters();
+
+        rrctp.setUrl("http://some.where");
+        assertEquals("http://some.where", rrctp.getUrl());
+
+        String[][] httpHeaders = new String[2][2];
+        httpHeaders[0][0] = "aaa";
+        httpHeaders[0][1] = "bbb";
+        httpHeaders[1][0] = "ccc";
+        httpHeaders[1][1] = "ddd";
+
+        rrctp.setHttpHeaders(httpHeaders);
+        assertEquals("aaa", rrctp.getHttpHeaders()[0][0]);
+        assertEquals("bbb", rrctp.getHttpHeaders()[0][1]);
+        assertEquals("ccc", rrctp.getHttpHeaders()[1][0]);
+        assertEquals("ddd", rrctp.getHttpHeaders()[1][1]);
+
+        rrctp.setHttpHeaders(null);
+        assertFalse(rrctp.checkHttpHeadersSet());
+
+        String[][] httpHeadersZeroLength = new String[0][0];
+        rrctp.setHttpHeaders(httpHeadersZeroLength);
+        assertFalse(rrctp.checkHttpHeadersSet());
+
+        rrctp.setHttpHeaders(httpHeaders);
+        assertTrue(rrctp.checkHttpHeadersSet());
+
+        rrctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.DELETE);
+        assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.DELETE, rrctp.getHttpMethod());
+
+        assertEquals("RestClientCarrierTechnologyParameters "
+                        + "[url=http://some.where, httpMethod=DELETE, httpHeaders=[[aaa, bbb], [ccc, ddd]]]",
+                        rrctp.toString());
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/SupportApexEventReceiver.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/SupportApexEventReceiver.java
new file mode 100644
index 000000000..d3f8b9e82
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/SupportApexEventReceiver.java
@@ -0,0 +1,70 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventReceiver;
+
+/**
+ * Support Apex event reveiver for unit test.
+ *
+ */
+public class SupportApexEventReceiver implements ApexEventReceiver {
+    private long lastExecutionId;
+    private Object lastEvent;
+    private int eventCount;
+
+    /* (non-Javadoc)
+     * @see org.onap.policy.apex.service.engine.event.ApexEventReceiver#receiveEvent(long, java.lang.Object)
+     */
+    @Override
+    public void receiveEvent(long executionId, Object event) throws ApexEventException {
+        this.lastExecutionId = executionId;
+        this.lastEvent = event;
+        this.eventCount++;
+    }
+
+    /* (non-Javadoc)
+     * @see org.onap.policy.apex.service.engine.event.ApexEventReceiver#receiveEvent(java.lang.Object)
+     */
+    @Override
+    public void receiveEvent(Object event) throws ApexEventException {
+        this.lastEvent = event;
+        this.eventCount++;
+    }
+
+    public long getLastExecutionId() {
+        return lastExecutionId;
+    }
+
+    public Object getLastEvent() {
+        return lastEvent;
+    }
+
+    /**
+     * Get the number of events received.
+     * 
+     * @return the number of events received
+     */
+    public int getEventCount() {
+        return eventCount;
+    }
+}