dart/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/remote/ByteRequestSink.java

/*
 * Copyright (c) 2014, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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.google.dart.server.internal.remote;

import com.google.common.base.Charsets;
import com.google.gson.JsonObject;

import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;

/**
 * An {@link OutputStream} based implementation of {@link RequestSink}.
 * 
 * @coverage dart.server.remote
 */
public class ByteRequestSink implements RequestSink {
  /**
   * The {@link PrintWriter} to print JSON strings to.
   */
  private final PrintWriter writer;

  /**
   * The {@link PrintStream} to print all lines to.
   */
  private DebugPrintStream debugStream;

  /**
   * Initializes a newly created request sink.
   * 
   * @param stream the byte stream to write JSON strings to
   * @param debugStream the {@link PrintStream} to print all lines to, may be {@code null}
   */
  public ByteRequestSink(OutputStream stream, DebugPrintStream debugStream) {
    writer = new PrintWriter(new OutputStreamWriter(stream, Charsets.UTF_8));
    this.debugStream = debugStream;
  }

  @Override
  public void add(JsonObject request) {
    String text = request.toString();
    if (debugStream != null) {
      if (!text.contains("server.getVersion")) {
        debugStream.println(System.currentTimeMillis() + " => " + text);
      }
    }
    writer.println(text);
    writer.flush();
  }

  @Override
  public void close() {
    writer.close();
  }
}