Add CDS simulator to policy-models

[policy/models.git] / models-interactions / model-simulators / src / main / java / org / onap / policy / simulators / CdsSimulator.java

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 (file)
index 0000000..dbbaa16
--- /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();
+    }
+}