com.aliyun.odps.graph.local.message.MsgBuffer.java Source code

Introduction

Here is the source code for com.aliyun.odps.graph.local.message.MsgBuffer.java

Source

/*
 * 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 com.aliyun.odps.graph.local.message;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;

import com.aliyun.odps.io.Writable;

public class MsgBuffer {

    private List<Writable> msges;

    public MsgBuffer() {
        msges = new ArrayList<Writable>();
    }

    public void addMessage(Writable msg) {
        synchronized (msges) {
            msges.add(msg);
        }
    }

    public boolean hasMessages() {
        synchronized (msges) {
            return msges.size() > 0;
        }
    }

    public List<Writable> getMessages() {
        synchronized (msges) {
            return msges;
        }
    }

    public void dump(File out) throws IOException {
        synchronized (msges) {
            FileUtils.writeLines(out, msges);
        }
    }

}