Add CDS simulator to policy-models

Added CDS simulator to policy-models.  Added a test case to the CDS
Actor to verify that it works with the simulator.

Issue-ID: POLICY-2676
Change-Id: I9b10de3bde93c69e82df983f77eecc253de8a1a2
Signed-off-by: Jim Hahn <jrh3@att.com>

7 files changed, 367 insertions, 18 deletions

diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/CdsSimulator.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/CdsSimulator.java
new file mode 100644
index 000000000..dbbaa1681
--- /dev/null
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/CdsSimulator.java
@@ -0,0 +1,104 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation.
+ *  Modifications Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.simulators;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.google.protobuf.util.JsonFormat;
+import io.grpc.Server;
+import io.grpc.netty.NettyServerBuilder;
+import io.grpc.stub.StreamObserver;
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
+import lombok.Getter;
+import org.apache.commons.io.IOUtils;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceImplBase;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput.Builder;
+
+public class CdsSimulator {
+    @Getter
+    private final int port;
+
+    private final Server server;
+
+    /**
+     * Constructs the object, but does not start it.
+     *
+     * @param host host name of the server
+     * @param port port of the server
+     */
+    public CdsSimulator(String host, int port) {
+        this.port = port;
+
+        BluePrintProcessingServiceImplBase testCdsBlueprintServerImpl = new BluePrintProcessingServiceImplBase() {
+
+            @Override
+            public StreamObserver<ExecutionServiceInput> process(
+                            final StreamObserver<ExecutionServiceOutput> responseObserver) {
+
+                return new StreamObserver<ExecutionServiceInput>() {
+
+                    @Override
+                    public void onNext(final ExecutionServiceInput executionServiceInput) {
+                        try {
+                            String responseString = IOUtils.toString(
+                                            getClass().getResource("cds/CreateSubscriptionResponseEvent.json"),
+                                            StandardCharsets.UTF_8);
+                            Builder builder = ExecutionServiceOutput.newBuilder();
+                            JsonFormat.parser().ignoringUnknownFields().merge(responseString, builder);
+                            responseObserver.onNext(builder.build());
+
+                        } catch (InvalidProtocolBufferException e) {
+                            throw new SimulatorRuntimeException("Cannot convert ExecutionServiceOutput output", e);
+
+                        } catch (IOException e) {
+                            throw new SimulatorRuntimeException("Cannot read ExecutionServiceOutput from file", e);
+                        }
+                    }
+
+                    @Override
+                    public void onError(final Throwable throwable) {
+                        responseObserver.onError(throwable);
+                    }
+
+                    @Override
+                    public void onCompleted() {
+                        responseObserver.onCompleted();
+                    }
+                };
+            }
+        };
+
+        server = NettyServerBuilder.forAddress(new InetSocketAddress(host, port)).addService(testCdsBlueprintServerImpl)
+                        .build();
+    }
+
+    public void start() throws IOException {
+        server.start();
+    }
+
+    public void stop() {
+        server.shutdown();
+    }
+}
diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SimulatorRuntimeException.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SimulatorRuntimeException.java
new file mode 100644
index 000000000..b97e4d9f7
--- /dev/null
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/SimulatorRuntimeException.java
@@ -0,0 +1,41 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.simulators;
+
+public class SimulatorRuntimeException extends RuntimeException {
+    private static final long serialVersionUID = 1L;
+
+    public SimulatorRuntimeException() {
+        super();
+    }
+
+    public SimulatorRuntimeException(String message) {
+        super(message);
+    }
+
+    public SimulatorRuntimeException(Throwable cause) {
+        super(cause);
+    }
+
+    public SimulatorRuntimeException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/Util.java b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/Util.java
index 5cb518f4e..efc40367b 100644
--- a/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/Util.java
+++ b/models-interactions/model-simulators/src/main/java/org/onap/policy/simulators/Util.java
@@ -21,6 +21,7 @@
 
 package org.onap.policy.simulators;
 
+import java.io.IOException;
 import java.util.Properties;
 import org.onap.policy.common.endpoints.http.server.HttpServletServer;
 import org.onap.policy.common.endpoints.http.server.HttpServletServerFactoryInstance;
@@ -46,6 +47,7 @@ public class Util {
     public static final int VFCSIM_SERVER_PORT = 6668;
     public static final int GUARDSIM_SERVER_PORT = 6669;
     public static final int SDNCSIM_SERVER_PORT = 6670;
+    public static final int CDSSIM_SERVER_PORT = 6671;
     public static final int DMAAPSIM_SERVER_PORT = 3904;
 
     private static final String CANNOT_PROCESS_PARAMETERS = "cannot parse parameters ";
@@ -67,9 +69,21 @@ public class Util {
                 .build(AAISIM_SERVER_NAME, LOCALHOST, AAISIM_SERVER_PORT, "/", false, true);
         testServer.addServletClass("/*", AaiSimulatorJaxRs.class.getName());
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 5, 10000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
+        return testServer;
+    }
+
+    /**
+     * Build a CDS simulator.
+     *
+     * @return the simulator
+     * @throws InterruptedException if a thread is interrupted
+     * @throws IOException if an I/O error occurs
+     */
+    public static CdsSimulator buildCdsSim() throws InterruptedException, IOException {
+        final CdsSimulator testServer = new CdsSimulator(LOCALHOST, CDSSIM_SERVER_PORT);
+        testServer.start();
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
 
@@ -84,9 +98,7 @@ public class Util {
                 .build(SDNCSIM_SERVER_NAME, LOCALHOST, SDNCSIM_SERVER_PORT, "/", false, true);
         testServer.addServletClass("/*", SdncSimulatorJaxRs.class.getName());
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 5, 10000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
 
@@ -102,9 +114,7 @@ public class Util {
                 .build(SOSIM_SERVER_NAME, LOCALHOST, SOSIM_SERVER_PORT, "/", false, true);
         testServer.addServletClass("/*", SoSimulatorJaxRs.class.getName());
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 5, 10000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
 
@@ -119,9 +129,7 @@ public class Util {
                 .build(VFCSIM_SERVER_NAME, LOCALHOST, VFCSIM_SERVER_PORT, "/", false, true);
         testServer.addServletClass("/*", VfcSimulatorJaxRs.class.getName());
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 5, 10000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
 
@@ -136,9 +144,7 @@ public class Util {
                 LOCALHOST, GUARDSIM_SERVER_PORT, "/", false, true);
         testServer.addServletClass("/*", GuardSimulatorJaxRs.class.getName());
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 5, 10000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
 
@@ -170,9 +176,13 @@ public class Util {
 
         HttpServletServer testServer = HttpServletServerFactoryInstance.getServerFactory().build(props).get(0);
         testServer.waitedStart(5000);
-        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, testServer.getPort(), 50, 1000L)) {
-            throw new IllegalStateException(CANNOT_CONNECT + testServer.getPort());
-        }
+        waitForServerToListen(testServer.getPort());
         return testServer;
     }
+
+    private static void waitForServerToListen(int port) throws InterruptedException {
+        if (!NetworkUtil.isTcpPortOpen(LOCALHOST, port, 200, 250L)) {
+            throw new IllegalStateException(CANNOT_CONNECT + port);
+        }
+    }
 }
diff --git a/models-interactions/model-simulators/src/main/resources/org/onap/policy/simulators/cds/CreateSubscriptionResponseEvent.json b/models-interactions/model-simulators/src/main/resources/org/onap/policy/simulators/cds/CreateSubscriptionResponseEvent.json
new file mode 100644
index 000000000..adb51adcb
--- /dev/null
+++ b/models-interactions/model-simulators/src/main/resources/org/onap/policy/simulators/cds/CreateSubscriptionResponseEvent.json
@@ -0,0 +1,29 @@
+{
+  "commonHeader": {
+    "timestamp": "2020-03-20T14:00:25.217Z",
+    "requestId": "123456-1000",
+    "subRequestId": "sub-123456-1000",
+    "flag": {
+    },
+    "originatorId": "sdnc"
+  },
+  "actionIdentifiers": {
+    "blueprintName": "pm_control",
+    "blueprintVersion": "1.0.0",
+    "actionName": "create-subscription",
+    "mode": "sync"
+  },
+  "status": {
+    "code": 200,
+    "message": "success",
+    "eventType": "EVENT_COMPONENT_EXECUTED",
+    "timestamp": "Fri Mar 20 14:00:26 GMT 2020"
+  },
+  "payload": {
+    "create-subscription-response": {
+      "odl-response": {
+        "status": "success"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/CdsSimulatorTest.java b/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/CdsSimulatorTest.java
new file mode 100644
index 000000000..5f82b7e94
--- /dev/null
+++ b/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/CdsSimulatorTest.java
@@ -0,0 +1,114 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.simulators;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import io.grpc.ManagedChannel;
+import io.grpc.internal.DnsNameResolverProvider;
+import io.grpc.internal.PickFirstLoadBalancerProvider;
+import io.grpc.netty.NettyChannelBuilder;
+import io.grpc.stub.StreamObserver;
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import org.apache.commons.io.IOUtils;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceStub;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
+import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
+import org.onap.policy.common.utils.coder.StandardCoder;
+
+public class CdsSimulatorTest {
+    private static final StandardCoder coder = new StandardCoder();
+
+    private CdsSimulator sim;
+
+    @Before
+    public void setUp() throws Exception {
+        sim = Util.buildCdsSim();
+    }
+
+    @After
+    public void tearDown() {
+        sim.stop();
+    }
+
+    @Test
+    public void test() throws Exception {
+        String reqstr = IOUtils.toString(getClass().getResource("cds/cds.request.json"), StandardCharsets.UTF_8);
+        ExecutionServiceInput request = coder.decode(reqstr, ExecutionServiceInput.class);
+
+        ManagedChannel channel = NettyChannelBuilder.forAddress("localhost", sim.getPort())
+            .nameResolverFactory(new DnsNameResolverProvider())
+            .loadBalancerFactory(new PickFirstLoadBalancerProvider()).usePlaintext().build();
+
+        try {
+            final CompletableFuture<ExecutionServiceOutput> future = new CompletableFuture<>();
+            final CountDownLatch completed = new CountDownLatch(1);
+
+            BluePrintProcessingServiceStub asyncStub = BluePrintProcessingServiceGrpc.newStub(channel);
+
+            StreamObserver<ExecutionServiceOutput> responseObserver = new StreamObserver<ExecutionServiceOutput>() {
+                @Override
+                public void onNext(ExecutionServiceOutput output) {
+                    future.complete(output);
+                }
+
+                @Override
+                public void onError(Throwable throwable) {
+                    future.completeExceptionally(throwable);
+                }
+
+                @Override
+                public void onCompleted() {
+                    completed.countDown();
+                }
+            };
+
+            StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
+            try {
+                // publish the message
+                requestObserver.onNext(request);
+
+                // indicate that the request is done
+                requestObserver.onCompleted();
+
+            } catch (RuntimeException e) {
+                requestObserver.onError(e);
+            }
+
+            // wait for it to complete
+            assertTrue(completed.await(5, TimeUnit.SECONDS));
+
+            ExecutionServiceOutput result = future.get();
+            assertEquals(200, result.getStatus().getCode());
+
+        } finally {
+            channel.shutdown();
+        }
+    }
+}
diff --git a/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/ExceptionsTest.java b/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/ExceptionsTest.java
new file mode 100644
index 000000000..e3d91f0f2
--- /dev/null
+++ b/models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/ExceptionsTest.java
@@ -0,0 +1,37 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.simulators;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.onap.policy.common.utils.test.ExceptionsTester;
+
+/**
+ * Tests XxxException classes.
+ */
+public class ExceptionsTest {
+
+    @Test
+    public void testSimulatorRuntimeException() {
+        assertEquals(4, new ExceptionsTester().test(SimulatorRuntimeException.class));
+    }
+}
diff --git a/models-interactions/model-simulators/src/test/resources/org/onap/policy/simulators/cds/cds.request.json b/models-interactions/model-simulators/src/test/resources/org/onap/policy/simulators/cds/cds.request.json
new file mode 100644
index 000000000..37e8b05ce
--- /dev/null
+++ b/models-interactions/model-simulators/src/test/resources/org/onap/policy/simulators/cds/cds.request.json
@@ -0,0 +1,14 @@
+{
+    "commonHeader": {
+        "originatorId": "POLICY",
+        "requestId": "c7c6a4aa-bb61-4a15-b831-ba1472dd4a65",
+        "subRequestId": "111be3d2-6c12-4f4b-a3e7-c349acced200"
+    },
+    "actionIdentifiers": {
+        "blueprintName": "pm_control",
+        "blueprintVersion": "1.0.0",
+        "actionName": "create-subscription",
+        "mode": "sync"
+    },
+    "payload": {}
+}