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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation.
* ================================================================================
* 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.examples.grpc;
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.file.Files;
import java.nio.file.Paths;
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;
import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
/**
* The Class GrpcTestDummyGrpcServer creates a dummy gRPC server to mimic a CDS implementation.
*/
public class GrpcTestDummyGrpcServer {
private Server server;
/**
* Dummy server for gRPC.
*
* @param host hostname of the server
* @param port port of the server
*/
public GrpcTestDummyGrpcServer(String host, int port) {
// Implement the dummy gRPC server
BluePrintProcessingServiceImplBase testCdsBlueprintServerImpl = new BluePrintProcessingServiceImplBase() {
@Override
public StreamObserver<ExecutionServiceInput>
process(final StreamObserver<ExecutionServiceOutput> responseObserver) {
return new StreamObserver<ExecutionServiceInput>() {
@Override
public void onNext(final ExecutionServiceInput executionServiceInput) {
String responseString = "";
try {
responseString = Files.readString(Paths.get(
"src/main/resources/examples/events/APEXgRPC/CreateSubscriptionResponseEvent.json"));
} catch (IOException e) {
throw new ApexEventRuntimeException("Cannot read executionServiceOutput from file", e);
}
ExecutionServiceOutput executionServiceOutput;
Builder builder = ExecutionServiceOutput.newBuilder();
try {
JsonFormat.parser().ignoringUnknownFields().merge(responseString, builder);
executionServiceOutput = builder.build();
responseObserver.onNext(executionServiceOutput);
} catch (InvalidProtocolBufferException e) {
throw new ApexEventRuntimeException(
"Output string cannot be converted to ExecutionServiceOutput type for gRPC request."
+ 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();
}
}
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