net.kuujo.vertigo.component.MessageHandlerComponent Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of vertigo Show documentation
There is a newer version: 1.0.2
/*
 * Copyright 2014 the original author or authors.
 *
 * 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 net.kuujo.vertigo.component;

import io.vertx.core.AbstractVerticle;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.ServiceHelper;
import io.vertx.core.json.JsonObject;
import net.kuujo.vertigo.VertigoException;
import net.kuujo.vertigo.VertigoOptions;
import net.kuujo.vertigo.context.ComponentContext;
import net.kuujo.vertigo.context.NetworkContext;
import net.kuujo.vertigo.deployment.DeploymentManager;
import net.kuujo.vertigo.instance.ComponentInstance;
import net.kuujo.vertigo.instance.InputCollector;
import net.kuujo.vertigo.instance.OutputCollector;
import net.kuujo.vertigo.message.VertigoMessage;
import net.kuujo.vertigo.spi.ComponentInstanceFactory;

/**
 * Abstract Java component which automatically registers all defined input ports to itself.
 *
 * @author Magnus Koch
 */
public abstract class MessageHandlerComponent extends AbstractComponent implements Handler> {

  /**
   * Returns the component's {@link InputCollector}. This is the element of the
   * component which provides an interface for receiving messages from other components.
   *
   * @return The components {@link InputCollector}.
   */
  public InputCollector input() {
    return component().input();
  }

  /**
   * Returns the component's {@link OutputCollector}. This is the element of the
   * component which provides an interface for sending messages to other components.
   *
   * @return The component's {@link OutputCollector}.
   */
  public OutputCollector output() {
    return component().output();
  }

  @Override
  protected void initComponent(Future initFuture) throws Exception {

    // Register all input ports automatically
    input()
        .ports()
        .forEach(port -> {
          input()
              .port(port.name())
              .handler(this::safeHandle);
        });

    super.initComponent(initFuture);

  }

  protected void safeHandle(VertigoMessage message) {
    try {
      handle(message);
    }
    catch (Throwable cause) {
      message.fail(cause);
    }
  }

}