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/*
* Copyright 2018 Huawei Technologies Co., Ltd.
*
* 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.open.infc.grpc.server;
import java.io.IOException;
import java.util.Map.Entry;
import java.util.logging.Logger;
import org.onap.cli.fw.cmd.OnapCommand;
import org.onap.cli.fw.conf.OnapCommandConfig;
import org.onap.cli.fw.conf.OnapCommandConstants;
import org.onap.cli.fw.error.OnapCommandException;
import org.onap.cli.fw.output.OnapCommandResultType;
import org.onap.cli.fw.registrar.OnapCommandRegistrar;
import org.onap.cli.main.OnapCli;
import org.open.infc.grpc.Args;
import org.open.infc.grpc.Input;
import org.open.infc.grpc.OpenInterfaceGrpc;
import org.open.infc.grpc.Output;
import org.open.infc.grpc.Output.Builder;
import org.open.infc.grpc.Result;
import io.grpc.Server;
import io.grpc.ServerBuilder;
import io.grpc.stub.StreamObserver;
public class OpenInterfaceGrpcServer {
private static final Logger logger = Logger.getLogger(OpenInterfaceGrpcServer.class.getName());
private static final String CONF_FILE = "oclip-grpc-server.properties";
private static final String CONF_SERVER_PORT = "oclip.grpc_server_port";
static {
OnapCommandConfig.addProperties(CONF_FILE);
}
private Server server;
private void start() throws IOException {
/* The port on which the server should run */
int port = Integer.parseInt(OnapCommandConfig.getPropertyValue(CONF_SERVER_PORT));
server = ServerBuilder.forPort(port)
.addService(new OpenInterfaceGrpcImpl())
.build()
.start();
logger.info("Server started, listening on " + port);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
// Use stderr here since the logger may have been reset by its JVM shutdown hook.
System.err.println("*** shutting down gRPC server since JVM is shutting down");
OpenInterfaceGrpcServer.this.stop();
System.err.println("*** server shut down");
}
});
}
private void stop() {
if (server != null) {
server.shutdown();
}
}
/**
* Await termination on the main thread since the grpc library uses daemon threads.
*/
private void blockUntilShutdown() throws InterruptedException {
if (server != null) {
server.awaitTermination();
}
}
/**
* Main launches the server from the command line.
*/
public static void main(String[] args) throws IOException, InterruptedException {
final OpenInterfaceGrpcServer server = new OpenInterfaceGrpcServer();
server.start();
server.blockUntilShutdown();
}
static class OpenRemoteCli extends OnapCli {
private String outputs = "";
public OpenRemoteCli(String product, String[] args) {
super(product, args);
}
public void print(String msg) {
outputs += msg + "\n";
}
public String getResult() {
return outputs;
}
}
static class OpenInterfaceGrpcImpl extends OpenInterfaceGrpc.OpenInterfaceImplBase {
@Override
public void invoke(Input req, StreamObserver<Output> responseObserver) {
Builder reply = Output.newBuilder();
logger.info(req.toString());
String product = req.getOptionsMap().get(OnapCommandConstants.OPEN_CLI_PRODUCT_NAME);
String format = req.getOptionsMap().getOrDefault(OnapCommandConstants.DEFAULT_PARAMETER_OUTPUT_FORMAT, OnapCommandResultType.JSON.name().toLowerCase());
String command = req.getAction();
try {
OnapCommand cmd = OnapCommandRegistrar.getRegistrar().get(command, product);
cmd.getParametersMap().get(OnapCommandConstants.DEFAULT_PARAMETER_OUTPUT_FORMAT).setValue(format);
for (Entry<String, String> arg: req.getParams().entrySet()) {
cmd.getParametersMap().get(arg.getKey()).setValue(arg.getValue());
}
cmd.execute();
reply.putAttrs(OnapCommandConstants.RESULTS, cmd.getResult().print());
reply.setSuccess(true);
reply.putAttrs(OnapCommandConstants.ERROR, "{}");
} catch (OnapCommandException e) {
logger.info(e.getMessage());
reply.putAttrs(OnapCommandConstants.RESULTS, "{}");
reply.setSuccess(false);
reply.putAttrs(OnapCommandConstants.ERROR, e.toJsonString());
}
responseObserver.onNext(reply.build());
responseObserver.onCompleted();
}
@Override
public void remoteCli(Args req, StreamObserver<Result> responseObserver) {
logger.info(req.toString());
OpenRemoteCli cli = new OpenRemoteCli(req.getProduct(), req.getArgsList().toArray(new String [] {}));
cli.handle();
logger.info(cli.getResult());
Result reply = Result.newBuilder().setExitCode(cli.getExitCode()).setOutput(cli.getResult()).build();
responseObserver.onNext(reply);
responseObserver.onCompleted();
}
}
}
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