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Java implementation of the Sendmail Milter protocol.

There is a newer version: 0.8

/*
 * Licensed 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.nightcode.milter.net;

import org.nightcode.milter.MilterHandler;
import org.nightcode.milter.codec.Int32LenFrameDecoder;
import org.nightcode.milter.codec.Int32LenFrameEncoder;
import org.nightcode.milter.codec.MilterPacketDecoder;
import org.nightcode.milter.codec.MilterPacketEncoder;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

/**
 * Implementation of ChannelInitializer.
 */
public class SessionInitializer extends ChannelInitializer {

  private final boolean loggingEnabled;
  private final String logLevel;
  private final MilterHandler milterHandler;

  SessionInitializer(MilterHandler milterHandler) {
    this.milterHandler = milterHandler;

    loggingEnabled = Boolean.getBoolean("jmilter.netty.loggingEnabled");
    logLevel = System.getProperty("jmilter.netty.logLevel", "INFO");
  }

  @Override protected void initChannel(SocketChannel channel) {
    ChannelPipeline pipeline = channel.pipeline();

    if (loggingEnabled) {
      pipeline.addLast(new LoggingHandler(LogLevel.valueOf(logLevel)));
    }

    pipeline.addLast("FrameEncoder", new Int32LenFrameEncoder());
    pipeline.addLast("MilterPacketEncoder", new MilterPacketEncoder());

    pipeline.addLast("FrameDecoder", new Int32LenFrameDecoder());
    pipeline.addLast("MilterPacketDecoder", new MilterPacketDecoder());

    pipeline.addLast("MilterChannelHandler", new MilterChannelHandler(milterHandler));
  }
}