dubbo ObserverToClientCallListenerAdapter 源码

2022-10-20
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dubbo ObserverToClientCallListenerAdapter 代码

文件路径：/dubbo-rpc/dubbo-rpc-triple/src/main/java/org/apache/dubbo/rpc/protocol/tri/call/ObserverToClientCallListenerAdapter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.dubbo.rpc.protocol.tri.call;

import org.apache.dubbo.common.stream.StreamObserver;
import org.apache.dubbo.rpc.TriRpcStatus;

import java.util.Map;
import java.util.function.Consumer;

public class ObserverToClientCallListenerAdapter implements ClientCall.Listener {

    private final StreamObserver<Object> delegate;
    private ClientCall call;
    private Consumer<ClientCall> onStartConsumer = clientCall -> { };

    public ObserverToClientCallListenerAdapter(StreamObserver<Object> delegate) {
        this.delegate = delegate;
    }

    public void setOnStartConsumer(Consumer<ClientCall> onStartConsumer) {
        this.onStartConsumer = onStartConsumer;
    }

    @Override
    public void onMessage(Object message) {
        delegate.onNext(message);
        if (call.isAutoRequest()) {
            call.request(1);
        }
    }

    @Override
    public void onClose(TriRpcStatus status, Map<String, Object> trailers) {
        if (status.isOk()) {
            delegate.onCompleted();
        } else {
            delegate.onError(status.asException());
        }
    }

    @Override
    public void onStart(ClientCall call) {
        this.call = call;
        if (call.isAutoRequest()) {
            call.request(1);
        }

        onStartConsumer.accept(call);
    }
}

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本文标签： Java
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