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    1   /*
    2    * Copyright 2012 The Netty Project
    3    *
    4    * The Netty Project licenses this file to you under the Apache License,
    5    * version 2.0 (the "License"); you may not use this file except in compliance
    6    * with the License. You may obtain a copy of the License at:
    7    *
    8    *   http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.channel;
    17
    18  import static org.jboss.netty.channel.Channels.*;
    19
    20  /**
    21   * The default {@link WriteCompletionEvent} implementation.
    22   */
    23  public class DefaultWriteCompletionEvent implements WriteCompletionEvent {
    24
    25      private final Channel channel;
    26      private final long writtenAmount;
    27
    28      /**
    29       * Creates a new instance.
    30       */
    31      public DefaultWriteCompletionEvent(Channel channel, long writtenAmount) {
    32          if (channel == null) {
    33              throw new NullPointerException("channel");
    34          }
    35          if (writtenAmount <= 0) {
    36              throw new IllegalArgumentException(
    37                      "writtenAmount must be a positive integer: " + writtenAmount);
    38          }
    39
    40          this.channel = channel;
    41          this.writtenAmount = writtenAmount;
    42      }
    43
    44      public Channel getChannel() {
    45          return channel;
    46      }
    47
    48      public ChannelFuture getFuture() {
    49          return succeededFuture(getChannel());
    50      }
    51
    52      public long getWrittenAmount() {
    53          return writtenAmount;
    54      }
    55
    56      @Override
    57      public String toString() {
    58          String channelString = getChannel().toString();
    59          StringBuilder buf = new StringBuilder(channelString.length() + 32);
    60          buf.append(channelString);
    61          buf.append(" WRITTEN_AMOUNT: ");
    62          buf.append(getWrittenAmount());
    63          return buf.toString();
    64      }
    65  }