com.baasbox.db.async.ExportJob.java Source code

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Here is the source code for com.baasbox.db.async.ExportJob.java

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/*
 * Copyright (c) 2014.
 *
 * BaasBox - info-at-baasbox.com
 *
 * 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 com.baasbox.db.async;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.exception.ExceptionUtils;

import com.baasbox.BBConfiguration;
import com.baasbox.BBInternalConstants;
import com.baasbox.db.DbHelper;
import com.baasbox.service.logging.BaasBoxLogger;

public class ExportJob implements Runnable {

    private String fileName;
    private String appcode;

    public ExportJob(String fileName, String appcode) {
        this.fileName = fileName;
        this.appcode = appcode;
    }

    @Override
    public void run() {
        FileOutputStream dest = null;
        ZipOutputStream zip = null;
        FileOutputStream tempJsonOS = null;
        FileInputStream in = null;
        try {
            //File f = new File(this.fileName);
            File f = File.createTempFile("export", ".temp");

            dest = new FileOutputStream(f);
            zip = new ZipOutputStream(dest);

            File tmpJson = File.createTempFile("export", ".json");
            tempJsonOS = new FileOutputStream(tmpJson);
            DbHelper.exportData(this.appcode, tempJsonOS);
            BaasBoxLogger.info(String.format("Writing %d bytes ", tmpJson.length()));
            tempJsonOS.close();

            ZipEntry entry = new ZipEntry("export.json");
            zip.putNextEntry(entry);
            in = new FileInputStream(tmpJson);
            final int BUFFER = BBConfiguration.getImportExportBufferSize();
            byte buffer[] = new byte[BUFFER];

            int length;
            while ((length = in.read(buffer)) > 0) {
                zip.write(buffer, 0, length);
            }
            zip.closeEntry();
            in.close();

            File manifest = File.createTempFile("manifest", ".txt");
            FileUtils.writeStringToFile(manifest,
                    BBInternalConstants.IMPORT_MANIFEST_VERSION_PREFIX + BBConfiguration.getApiVersion());

            ZipEntry entryManifest = new ZipEntry("manifest.txt");
            zip.putNextEntry(entryManifest);
            zip.write(FileUtils.readFileToByteArray(manifest));
            zip.closeEntry();

            tmpJson.delete();
            manifest.delete();

            File finaldestination = new File(this.fileName);
            FileUtils.moveFile(f, finaldestination);

        } catch (Exception e) {
            BaasBoxLogger.error(ExceptionUtils.getMessage(e));
        } finally {
            try {
                if (zip != null)
                    zip.close();
                if (dest != null)
                    dest.close();
                if (tempJsonOS != null)
                    tempJsonOS.close();
                if (in != null)
                    in.close();

            } catch (Exception ioe) {
                BaasBoxLogger.error(ExceptionUtils.getMessage(ioe));
            }
        }
    }

}