core/camel-core/src/test/java/org/apache/camel/component/file/FileConsumePollEnrichFileUsingProcessorTest.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
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package org.apache.camel.component.file;

import org.apache.camel.CamelExchangeException;
import org.apache.camel.ConsumerTemplate;
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.component.mock.MockEndpoint;
import org.apache.camel.util.FileUtil;
import org.junit.jupiter.api.Test;

public class FileConsumePollEnrichFileUsingProcessorTest extends ContextTestSupport {

    @Test
    public void testPollEnrich() throws Exception {
        getMockEndpoint("mock:start").expectedBodiesReceived("Start");

        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedBodiesReceived("Big file");

        mock.expectedFileExists(testFile("enrich/.done/AAA.fin"));
        mock.expectedFileExists(testFile("enrichdata/.done/AAA.dat"));
        mock.expectedFileExists(testFile("enrichdata/BBB.dat"));

        template.sendBodyAndHeader(fileUri("enrichdata"), "Big file",
                Exchange.FILE_NAME, "AAA.dat");
        template.sendBodyAndHeader(fileUri("enrichdata"),
                "Other Big file", Exchange.FILE_NAME, "BBB.dat");
        template.sendBodyAndHeader(fileUri("enrich"), "Start",
                Exchange.FILE_NAME, "AAA.fin");

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() {
        return new RouteBuilder() {
            @Override
            public void configure() {
                from(fileUri("enrich?initialDelay=0&delay=10&move=.done"))
                        .process(new Processor() {
                            public void process(Exchange exchange) throws Exception {
                                String name = exchange.getIn().getHeader(Exchange.FILE_NAME_ONLY, String.class);
                                name = FileUtil.stripExt(name) + ".dat";

                                // use a consumer template to get the data file
                                Exchange data = null;
                                ConsumerTemplate con = exchange.getContext().createConsumerTemplate();
                                try {
                                    // try to get the data file
                                    data = con.receive(
                                            fileUri("enrichdata?initialDelay=0&delay=10&move=.done&fileName="
                                                    + name),
                                            5000);
                                } finally {
                                    // stop the consumer as it does not need to poll for
                                    // files anymore
                                    con.stop();
                                }

                                // if we found the data file then process it by sending
                                // it to the direct:data endpoint
                                if (data != null) {
                                    template.send("direct:data", data);
                                } else {
                                    // otherwise do a rollback
                                    throw new CamelExchangeException("Cannot find the data file " + name, exchange);
                                }
                            }
                        }).to("mock:start");

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