org.apache.camel.component.saga.SagaEndpoint Maven / Gradle / Ivy
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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.saga;
import org.apache.camel.Category;
import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.UriEndpoint;
import org.apache.camel.spi.UriPath;
import org.apache.camel.support.DefaultEndpoint;
import org.apache.camel.util.ObjectHelper;
/**
* Execute custom actions within a route using the Saga EIP.
*/
@UriEndpoint(firstVersion = "2.21.0", scheme = "saga", title = "Saga", syntax = "saga:action", producerOnly = true,
category = { Category.CLUSTERING }, headersClass = SagaConstants.class)
public class SagaEndpoint extends DefaultEndpoint {
public enum SagaEndpointAction {
COMPLETE,
COMPENSATE
}
@UriPath(description = "Action to execute (complete or compensate)")
@Metadata(required = true)
private final SagaEndpointAction action;
public SagaEndpoint(String endpointUri, SagaComponent component, String action) {
super(endpointUri, component);
this.action = SagaEndpointAction.valueOf(ObjectHelper.notNull(action, "action").toUpperCase());
}
@Override
public Producer createProducer() throws Exception {
if (SagaEndpointAction.COMPLETE.equals(this.action)) {
return new SagaProducer(this, true);
} else if (SagaEndpointAction.COMPENSATE.equals(this.action)) {
return new SagaProducer(this, false);
} else {
throw new IllegalStateException("Unsupported action '" + this.action + "' in saga endpoint");
}
}
@Override
public Consumer createConsumer(Processor processor) throws Exception {
throw new UnsupportedOperationException("Consumer not allowed for saga endpoint");
}
}