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Hawkular Bus Framework Common Library for use with both consumer and producer code.

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/*
 * Copyright 2014-2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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.hawkular.bus.common;

/**
 * Identifies a message that has been sent over the message bus.
 */
public class MessageId {
    private final String id;

    public MessageId() {
        this.id = null;
    }

    public MessageId(String id) {
        if (id == null || id.length() == 0) {
            throw new IllegalArgumentException("ID cannot be null or empty");
        }
        this.id = id;
    }

    public String getId() {
        return id;
    }

    @Override
    public String toString() {
        return id;
    }

    @Override
    public int hashCode() {
        return id.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof MessageId)) {
            return false;
        }
        MessageId other = (MessageId) obj;
        return id.equals(other.id);
    }
}