FileBeginFailureOneTimeTest.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.component.file;

import java.io.File;

import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.impl.JndiRegistry;

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

    private MyStrategy myStrategy = new MyStrategy();

    @Override
    protected void setUp() throws Exception {
        deleteDirectory("target/begin");
        super.setUp();
    }

    @Override
    protected JndiRegistry createRegistry() throws Exception {
        JndiRegistry jndi = super.createRegistry();
        jndi.bind("myStrategy", myStrategy);
        return jndi;
    }

    public void testBeginFailureOneTime() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedMessageCount(1);

        template.sendBodyAndHeader("file://target/begin", "Hello World", Exchange.FILE_NAME, "hello.txt");

        assertMockEndpointsSatisfied();

        assertEquals("Begin should have been invoked 2 times", 2, myStrategy.getInvoked());
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("file://target/begin?processStrategy=#myStrategy")
                    .convertBodyTo(String.class)
                    .to("mock:result");
            }
        };
    }

    private static class MyStrategy implements GenericFileProcessStrategy<File> {

        private volatile int invoked;

        public void prepareOnStartup(GenericFileOperations<File> fileGenericFileOperations, GenericFileEndpoint<File> fileGenericFileEndpoint) throws Exception {
        }

        public boolean begin(GenericFileOperations<File> fileGenericFileOperations, GenericFileEndpoint<File> fileGenericFileEndpoint,
                             Exchange exchange, GenericFile<File> fileGenericFile) throws Exception {
            invoked++;
            if (invoked <= 1) {
                throw new IllegalArgumentException("Damn I cannot do this");
            }
            return true;
        }

        public void abort(GenericFileOperations<File> fileGenericFileOperations, GenericFileEndpoint<File> fileGenericFileEndpoint,
                          Exchange exchange, GenericFile<File> fileGenericFile) throws Exception {
            // noop
        }

        public void commit(GenericFileOperations<File> fileGenericFileOperations, GenericFileEndpoint<File> fileGenericFileEndpoint,
                            Exchange exchange, GenericFile<File> fileGenericFile) throws Exception {
        }

        public void rollback(GenericFileOperations<File> fileGenericFileOperations, GenericFileEndpoint<File> fileGenericFileEndpoint,
                            Exchange exchange, GenericFile<File> fileGenericFile) throws Exception {
        }

        public int getInvoked() {
            return invoked;
        }
    }

}