trunk/camel-core/src/test/java/org/apache/camel/processor/interceptor/InterceptorStrategyOrderedTest.java

/**
 * 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.processor.interceptor;

import org.apache.camel.CamelContext;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.spi.InterceptStrategy;
import org.apache.camel.util.Ordered;

/**
 * @version 
 */
public class InterceptorStrategyOrderedTest extends ContextTestSupport {

    public void testInterceptorStrategyOrdered() throws Exception {
        getMockEndpoint("mock:result").expectedBodiesReceived("Hello World");
        getMockEndpoint("mock:result").expectedHeaderReceived("order", "12");

        template.sendBody("direct:start", "Hello World");

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                // interceptors should be invoked according to how they are ordered
                context.addInterceptStrategy(new BarInterceptStrategy());
                context.addInterceptStrategy(new FooInterceptStrategy());

                from("direct:start").to("mock:result");
            }
        };
    }

    public static class FooInterceptStrategy implements InterceptStrategy, Ordered {

        public Processor wrapProcessorInInterceptors(CamelContext context, ProcessorDefinition<?> definition, final Processor target, Processor nextTarget) throws Exception {
            Processor answer = new Processor() {
                public void process(Exchange exchange) throws Exception {
                    String order = exchange.getIn().getHeader("order", "", String.class);
                    order = order + getOrder();
                    exchange.getIn().setHeader("order", order);

                    target.process(exchange);
                }
            };
            return answer;
        }

        public int getOrder() {
            return 1;
        }
    }

    public static class BarInterceptStrategy implements InterceptStrategy, Ordered {

        public Processor wrapProcessorInInterceptors(CamelContext context, ProcessorDefinition<?> definition, final Processor target, Processor nextTarget) throws Exception {
            Processor answer = new Processor() {
                public void process(Exchange exchange) throws Exception {
                    String order = exchange.getIn().getHeader("order", "", String.class);
                    order = order + getOrder();
                    exchange.getIn().setHeader("order", order);

                    target.process(exchange);
                }
            };
            return answer;
        }

        public int getOrder() {
            return 2;
        }
    }
}