Add CDS client

Change-Id: I3f77a2c9e8341239b97675f5897cecf28c7dfb6f
Issue-ID: SO-1483
Signed-off-by: Alexis de Talhouët <adetalhouet89@gmail.com>

3 files changed, 260 insertions, 0 deletions

diff --git a/common/src/test/java/org/onap/so/client/cds/CDSProcessingClientTest.java b/common/src/test/java/org/onap/so/client/cds/CDSProcessingClientTest.java
new file mode 100644
index 0000000000..2bfa754f0e
--- /dev/null
+++ b/common/src/test/java/org/onap/so/client/cds/CDSProcessingClientTest.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2019 Bell Canada.
+ *
+ * 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.
+ */
+package org.onap.so.client.cds;
+
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import io.grpc.inprocess.InProcessChannelBuilder;
+import io.grpc.inprocess.InProcessServerBuilder;
+import io.grpc.stub.StreamObserver;
+import io.grpc.testing.GrpcCleanupRule;
+import io.grpc.util.MutableHandlerRegistry;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.mockito.Mock;
+import org.onap.ccsdk.apps.controllerblueprints.common.api.ActionIdentifiers;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceImplBase;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceInput;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceOutput;
+
+@RunWith(JUnit4.class)
+public class CDSProcessingClientTest {
+
+    @Rule
+    public final GrpcCleanupRule grpcCleanup = new GrpcCleanupRule();
+
+    @Mock
+    private CDSProcessingListener listener = spy(new TestCDSProcessingListener());
+
+    private CDSProcessingHandler handler;
+    private CDSProcessingClient client;
+
+
+    private final MutableHandlerRegistry serviceRegistry = new MutableHandlerRegistry();
+    private final List<String> messagesDelivered = new ArrayList<>();
+    private final CountDownLatch allRequestsDelivered = new CountDownLatch(1);
+    private final AtomicReference<StreamObserver<ExecutionServiceOutput>> responseObserverRef = new AtomicReference<>();
+
+    @Before
+    public void setUp() throws Exception {
+        String serverName = InProcessServerBuilder.generateName();
+        grpcCleanup.register(InProcessServerBuilder.forName(serverName)
+            .fallbackHandlerRegistry(serviceRegistry).directExecutor().build().start());
+
+        handler = new CDSProcessingHandler(listener);
+
+        client =
+            new CDSProcessingClient(InProcessChannelBuilder.forName(serverName).directExecutor().build(), handler);
+
+        final BluePrintProcessingServiceImplBase routeChatImpl =
+            new BluePrintProcessingServiceImplBase() {
+                @Override
+                public StreamObserver<ExecutionServiceInput> process(
+                    StreamObserver<ExecutionServiceOutput> responseObserver) {
+
+                    responseObserverRef.set(responseObserver);
+
+                    StreamObserver<ExecutionServiceInput> requestObserver = new StreamObserver<ExecutionServiceInput>() {
+                        @Override
+                        public void onNext(ExecutionServiceInput message) {
+                            messagesDelivered.add(message.getActionIdentifiers().getActionName());
+                        }
+
+                        @Override
+                        public void onError(Throwable t) {
+
+                        }
+
+                        @Override
+                        public void onCompleted() {
+                            allRequestsDelivered.countDown();
+                        }
+                    };
+
+                    return requestObserver;
+                }
+            };
+
+        serviceRegistry.addService(routeChatImpl);
+    }
+
+    @After
+    public void tearDown() {
+        client.close();
+    }
+
+    @Test
+    public void testClientCst() {
+        new CDSProcessingClient(listener);
+    }
+
+
+    @Test
+    public void testSendMessageFail() throws Exception {
+
+        ExecutionServiceInput fakeRequest1 = ExecutionServiceInput.newBuilder().setActionIdentifiers(
+            ActionIdentifiers.newBuilder().setActionName("request1").build()).build();
+
+        CountDownLatch finishLatch = client.sendRequest(fakeRequest1);
+
+        responseObserverRef.get().onError(new Throwable("fail test"));
+        verify(listener).onError(any(Throwable.class));
+
+        assertTrue(finishLatch.await(1, TimeUnit.SECONDS));
+    }
+
+    @Test
+    public void testSendMessage() throws Exception {
+
+        ExecutionServiceInput fakeRequest1 = ExecutionServiceInput.newBuilder().setActionIdentifiers(
+            ActionIdentifiers.newBuilder().setActionName("request1").build()).build();
+
+        ExecutionServiceOutput fakeResponse1 = ExecutionServiceOutput.newBuilder().setActionIdentifiers(
+            ActionIdentifiers.newBuilder().setActionName("response1").build()).build();
+
+        ExecutionServiceOutput fakeResponse2 = ExecutionServiceOutput.newBuilder().setActionIdentifiers(
+            ActionIdentifiers.newBuilder().setActionName("response2").build()).build();
+
+        CountDownLatch finishLatch = client.sendRequest(fakeRequest1);
+
+        // request message sent and delivered for one time
+        assertTrue(allRequestsDelivered.await(1, TimeUnit.SECONDS));
+        assertEquals(Collections.singletonList("request1"), messagesDelivered);
+
+        // Let the server send out two simple response messages
+        // and verify that the client receives them.
+        responseObserverRef.get().onNext(fakeResponse1);
+        verify(listener).onMessage(fakeResponse1);
+        responseObserverRef.get().onNext(fakeResponse2);
+        verify(listener).onMessage(fakeResponse2);
+
+        // let server complete.
+        responseObserverRef.get().onCompleted();
+
+        assertTrue(finishLatch.await(1, TimeUnit.SECONDS));
+    }
+
+}
\ No newline at end of file
diff --git a/common/src/test/java/org/onap/so/client/cds/TestCDSProcessingListener.java b/common/src/test/java/org/onap/so/client/cds/TestCDSProcessingListener.java
new file mode 100644
index 0000000000..df302f6e35
--- /dev/null
+++ b/common/src/test/java/org/onap/so/client/cds/TestCDSProcessingListener.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2019 Bell Canada.
+ *
+ * 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.
+ */
+package org.onap.so.client.cds;
+
+import io.grpc.Status;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceOutput;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TestCDSProcessingListener implements CDSProcessingListener {
+
+    private static final Logger log = LoggerFactory.getLogger(TestCDSProcessingListener.class);
+
+    @Override
+    public void onMessage(ExecutionServiceOutput message) {
+        log.info("Received notification from CDS: {}", message);
+    }
+
+    @Override
+    public void onError(Throwable t) {
+        Status status = Status.fromThrowable(t);
+        log.error("Failed processing blueprint {}", status, t);
+    }
+}
diff --git a/common/src/test/java/org/onap/so/client/cds/TestCDSPropertiesImpl.java b/common/src/test/java/org/onap/so/client/cds/TestCDSPropertiesImpl.java
new file mode 100644
index 0000000000..efb9b07871
--- /dev/null
+++ b/common/src/test/java/org/onap/so/client/cds/TestCDSPropertiesImpl.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2019 Bell Canada.
+ *
+ * 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.
+ */
+package org.onap.so.client.cds;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class TestCDSPropertiesImpl implements CDSProperties {
+
+    public TestCDSPropertiesImpl() {
+        // Needed for service loader
+    }
+
+    @Override
+    public String getHost() {
+        return "endpoint";
+    }
+
+    @Override
+    public int getPort() {
+        return 9999;
+    }
+
+    @Override
+    public URL getEndpoint() {
+        return null;
+    }
+
+    @Override
+    public String getSystemName() {
+        return "MSO";
+    }
+
+    @Override
+    public Integer getRetries() {
+        return null;
+    }
+
+    @Override
+    public Long getDelayBetweenRetries() {
+        return null;
+    }
+
+    @Override
+    public boolean mapNotFoundToEmpty() {
+        return false;
+    }
+}