au.edu.uws.eresearch.cr8it.SpringIntegrationUtils.java Source code

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Here is the source code for au.edu.uws.eresearch.cr8it.SpringIntegrationUtils.java

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/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed 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 au.edu.uws.eresearch.cr8it;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.DirectFieldAccessor;
import org.springframework.context.ApplicationContext;
import org.springframework.expression.Expression;
import org.springframework.integration.file.FileReadingMessageSource;
import org.springframework.integration.file.FileWritingMessageHandler;

/**
 * Displays the names of the input and output directories.
 *
 * @author Shilo Banihit
 * @since 1.0
 *
 */
public final class SpringIntegrationUtils {

    private static final Log logger = LogFactory.getLog(SpringIntegrationUtils.class);

    private SpringIntegrationUtils() {
    }

    /**
     * Helper Method to dynamically determine and display input and output
     * directories as defined in the Spring Integration context.
     *
     * @param context Spring Application Context
     */
    public static void displayDirectories(final ApplicationContext context) {

        final File inDir = (File) new DirectFieldAccessor(context.getBean(FileReadingMessageSource.class))
                .getPropertyValue("directory");

        final Map<String, FileWritingMessageHandler> fileWritingMessageHandlers = context
                .getBeansOfType(FileWritingMessageHandler.class);

        final List<String> outputDirectories = new ArrayList<String>();

        for (final FileWritingMessageHandler messageHandler : fileWritingMessageHandlers.values()) {
            final Expression outDir = (Expression) new DirectFieldAccessor(messageHandler)
                    .getPropertyValue("destinationDirectoryExpression");
            outputDirectories.add(outDir.getExpressionString());
        }

        final StringBuilder stringBuilder = new StringBuilder();

        stringBuilder.append("\n=========================================================");
        stringBuilder.append("\n");
        stringBuilder.append("\n    Input directory is : '" + inDir.getAbsolutePath() + "'");

        for (final String outputDirectory : outputDirectories) {
            stringBuilder.append("\n    Output directory is: '" + outputDirectory + "'");
        }

        stringBuilder.append("\n\n=========================================================");

        logger.info(stringBuilder.toString());

    }

}