org.wso2.carbon.connector.FileCopyInStream.java Source code

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Here is the source code for org.wso2.carbon.connector.FileCopyInStream.java

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/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 * 
 * WSO2 Inc. 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.wso2.carbon.connector;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.xml.stream.XMLStreamException;

import org.apache.axiom.om.OMElement;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemManager;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.VFS;
import org.apache.synapse.MessageContext;
import org.codehaus.jettison.json.JSONException;
import org.wso2.carbon.connector.core.AbstractConnector;
import org.wso2.carbon.connector.core.ConnectException;
import org.wso2.carbon.connector.core.Connector;
import org.wso2.carbon.connector.util.FTPSiteUtils;
import org.wso2.carbon.connector.util.ResultPayloadCreater;

public class FileCopyInStream extends AbstractConnector implements Connector {

    private static Log log = LogFactory.getLog(FileCopyInStream.class);

    public void connect(MessageContext messageContext) throws ConnectException {

        String fileLocation = getParameter(messageContext, "filelocation") == null ? ""
                : getParameter(messageContext, "filelocation").toString();
        String filename = getParameter(messageContext, "file") == null ? ""
                : getParameter(messageContext, "file").toString();

        String newFileLocation = getParameter(messageContext, "newfilelocation") == null ? ""
                : getParameter(messageContext, "newfilelocation").toString();
        if (log.isDebugEnabled()) {
            log.info("File creation started..." + filename.toString());
            log.info("File Location..." + fileLocation.toString());
        }

        boolean resultStatus = false;
        try {
            resultStatus = copyLargeFiles(fileLocation, filename, newFileLocation);
        } catch (IOException e) {
            handleException("Error while coping a large file.", e, messageContext);
        }

        generateResults(messageContext, resultStatus);

    }

    /**
     * Generate the results
     * 
     * @param messageContext
     * @param resultStatus
     */
    private void generateResults(MessageContext messageContext, boolean resultStatus) {
        ResultPayloadCreater resultPayload = new ResultPayloadCreater();

        String responce = "<result><copylarge>" + resultStatus + "</copylarge></result>";

        try {
            OMElement element = resultPayload.performSearchMessages(responce);
            resultPayload.preparePayload(messageContext, element);
        } catch (XMLStreamException e) {
            log.error(e.getMessage());
            handleException(e.getMessage(), messageContext);
        } catch (IOException e) {
            log.error(e.getMessage());
            handleException(e.getMessage(), messageContext);
        } catch (JSONException e) {
            log.error(e.getMessage());
            handleException(e.getMessage(), messageContext);
        }

    }

    /**
     * Copy the large files
     * 
     * @param fileLocation
     * @param filename
     * @param newFileLocation
     * @return
     */
    private boolean copyLargeFiles(String fileLocation, String filename, String newFileLocation)
            throws IOException {

        String sftpURL = newFileLocation + filename.toString();
        FileSystemOptions opts;
        boolean resultStatus = false;

        opts = FTPSiteUtils.createDefaultOptions();

        FileSystemManager manager = VFS.getManager();
        FileObject localFile = manager.resolveFile(fileLocation + filename, opts);
        FileObject remoteFile = manager.resolveFile(sftpURL, opts);

        InputStream fin = null;
        OutputStream fout = null;
        try {
            fin = localFile.getContent().getInputStream();
            fout = remoteFile.getContent().getOutputStream();
            IOUtils.copyLarge(fin, fout);
        } finally {
            if (fout != null) {
                fout.close();
            }
            if (fin != null) {
                fin.close();
            }
        }

        resultStatus = true;

        if (log.isDebugEnabled()) {
            log.info("File copying completed..." + filename.toString());
        }

        return resultStatus;
    }
}