Examples with EmptyRequestProto org.apache.hadoop.ipc.protobuf.TestProtos.EmptyRequestProto used on opensource projects

Example 1 with EmptyRequestProto

use of org.apache.hadoop.ipc.protobuf.TestProtos.EmptyRequestProto in project hadoop by apache.

the class TestProtoBufRPCCompatibility method testProtocolVersionMismatch.

@Test
public void testProtocolVersionMismatch() throws IOException, ServiceException {
    conf = new Configuration();
    conf.setInt(CommonConfigurationKeys.IPC_MAXIMUM_DATA_LENGTH, 1024);
    // Set RPC engine to protobuf RPC engine
    RPC.setProtocolEngine(conf, NewRpcService.class, ProtobufRpcEngine.class);
    // Create server side implementation
    NewServerImpl serverImpl = new NewServerImpl();
    BlockingService service = NewProtobufRpcProto.newReflectiveBlockingService(serverImpl);
    // Get RPC server for server side implementation
    server = new RPC.Builder(conf).setProtocol(NewRpcService.class).setInstance(service).setBindAddress(ADDRESS).setPort(PORT).build();
    addr = NetUtils.getConnectAddress(server);
    server.start();
    RPC.setProtocolEngine(conf, OldRpcService.class, ProtobufRpcEngine.class);
    OldRpcService proxy = RPC.getProxy(OldRpcService.class, 0, addr, conf);
    // Verify that exception is thrown if protocolVersion is mismatch between
    // client and server.
    EmptyRequestProto emptyRequest = EmptyRequestProto.newBuilder().build();
    try {
        proxy.ping(null, emptyRequest);
        fail("Expected an exception to occur as version mismatch.");
    } catch (Exception e) {
        if (!(e.getMessage().contains("version mismatch"))) {
            // Exception type is not what we expected, re-throw it.
            throw new IOException(e);
        }
    }
    // Verify that missing of optional field is still compatible in RPC call.
    RPC.setProtocolEngine(conf, NewerRpcService.class, ProtobufRpcEngine.class);
    NewerRpcService newProxy = RPC.getProxy(NewerRpcService.class, 0, addr, conf);
    newProxy.echo(null, emptyRequest);
}