Android Open Source - DistributedMemory Json Connection Handler

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License

The source code is released under:

Apache License

Java Source Code

package org.faudroids.distributedmemory.network;
//from  w  w  w .j  a va 2s .  c  om

import android.os.Handler;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;

/**
 * Handler for communication with another peer / host / client.
 */
final class JsonConnectionHandler implements ConnectionHandler<JsonNode> {

  private static final ObjectMapper mapper = new ObjectMapper();

  private final ConnectionHandler<String> connectionHandler;

  public JsonConnectionHandler(ConnectionHandler<String> connectionHandler) {
    this.connectionHandler = connectionHandler;
  }

  @Override
  public void start() {
    connectionHandler.start();
  }


  @Override
  public void stop() {
    connectionHandler.stop();
  }


  @Override
  public void sendMessage(JsonNode msg) {
    connectionHandler.sendMessage(msg.toString());
  }


  @Override
  public void registerMessageListener(MessageListener<JsonNode> listener, Handler handler) {
    connectionHandler.registerMessageListener(new MessageListenerAdapter(mapper, listener), handler);
  }


  @Override
  public void unregisterMessageListener() {
    connectionHandler.unregisterMessageListener();
  }


  private static final class MessageListenerAdapter implements MessageListener<String> {

    private final ObjectMapper mapper;
    private final MessageListener<JsonNode> targetListener;

    public MessageListenerAdapter(ObjectMapper mapper, MessageListener<JsonNode> targetListener) {
      this.mapper = mapper;
      this.targetListener = targetListener;
    }

    @Override
    public void onNewMessage(String msg) {
      try {
        JsonNode data = mapper.readTree(msg);
        targetListener.onNewMessage(data);
      } catch (IOException jpe) {
        throw new RuntimeException("failed to read JSON", jpe);
      }
    }

    @Override
    public void onConnectionError() {
      targetListener.onConnectionError();
    }

  }
}

Java Source Code List

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