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Camel Cron Component
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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.cron;

import org.apache.camel.Category;
import org.apache.camel.Consumer;
import org.apache.camel.DelegateEndpoint;
import org.apache.camel.Endpoint;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.component.cron.api.CamelCronConfiguration;
import org.apache.camel.spi.UriEndpoint;
import org.apache.camel.spi.UriParam;
import org.apache.camel.support.DefaultEndpoint;
import org.apache.camel.support.service.ServiceHelper;
import org.apache.camel.util.ObjectHelper;

/**
 * A generic interface for triggering events at times specified through the Unix cron syntax.
 */
@UriEndpoint(firstVersion = "3.1.0", scheme = "cron", title = "Cron", syntax = "cron:name", consumerOnly = true,
             remote = false, category = { Category.SCHEDULING })
public class CronEndpoint extends DefaultEndpoint implements DelegateEndpoint {

    private Endpoint delegate;

    @UriParam
    private CamelCronConfiguration configuration;

    public CronEndpoint(String endpointUri, CronComponent component, CamelCronConfiguration configuration) {
        super(endpointUri, component);
        this.configuration = configuration;
    }

    public void setDelegate(Endpoint delegate) {
        this.delegate = delegate;
    }

    @Override
    public Endpoint getEndpoint() {
        return delegate;
    }

    @Override
    public Producer createProducer() throws Exception {
        throw new UnsupportedOperationException();
    }

    @Override
    public Consumer createConsumer(Processor processor) throws Exception {
        Consumer consumer = delegate.createConsumer(processor);
        configureConsumer(consumer);
        return consumer;
    }

    public CamelCronConfiguration getConfiguration() {
        return configuration;
    }

    @Override
    protected void doStart() throws Exception {
        super.doStart();

        ObjectHelper.notNull(delegate, "delegate endpoint");
        ServiceHelper.startService(delegate);
    }

    @Override
    protected void doStop() throws Exception {
        super.doStop();
        ServiceHelper.stopService(delegate);
    }

    @Override
    protected void doShutdown() throws Exception {
        super.doShutdown();
        ServiceHelper.stopAndShutdownService(delegate);
    }
}