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Transactional event fabric for the JVM

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package com.obsidiandynamics.blackstrom.model;

import org.apache.commons.lang3.builder.*;

import com.obsidiandynamics.func.*;

public final class Command extends FluentMessage {
  private final Object objective;
  
  /** The time to live, in milliseconds. */
  private final int ttlMillis;

  public Command(String xid, Object objective, int ttlMillis) {
    this(xid, NOW, objective, ttlMillis);
  }

  public Command(String xid, long timestamp, Object objective, int ttlMillis) {
    super(xid, timestamp);
    this.objective = objective;
    this.ttlMillis = ttlMillis;
  }
  
  public  T getObjective() {
    return Classes.cast(objective);
  }
  
  public int getTtl() {
    return ttlMillis;
  }
  
  @Override
  public MessageType getMessageType() {
    return MessageType.COMMAND;
  }
  
  @Override
  public int hashCode() {
    return new HashCodeBuilder()
        .appendSuper(baseHashCode())
        .append(objective)
        .append(ttlMillis)
        .toHashCode();
  }
  
  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    } else if (obj instanceof Command) {
      final Command that = (Command) obj;
      return new EqualsBuilder()
          .appendSuper(baseEquals(that))
          .append(objective, that.objective)
          .append(ttlMillis, that.ttlMillis)
          .isEquals();
    } else {
      return false;
    }
  }

  @Override
  public String toString() {
    return Command.class.getSimpleName() + " [" + baseToString() + 
        ", objective=" + objective + ", ttl=" + ttlMillis + "]";
  }
  
  @Override
  public Command shallowCopy() {
    return copyMutableFields(this, new Command(getXid(), getTimestamp(), objective, ttlMillis));
  }
}