/*
* 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.sling.replication.servlet;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import org.apache.commons.io.IOUtils;
import org.apache.felix.scr.annotations.sling.SlingServlet;
import org.apache.http.entity.ContentType;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.apache.sling.replication.communication.ReplicationRequest;
import org.apache.sling.replication.packaging.ReplicationPackage;
import org.apache.sling.replication.packaging.ReplicationPackageExporter;
import org.apache.sling.replication.resources.ReplicationConstants;
import org.apache.sling.replication.util.RequestUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Servlet to handle fetching of replication content.
*/
@SlingServlet(resourceTypes = ReplicationConstants.EXPORTER_RESOURCE_TYPE, methods = "POST")
public class ReplicationPackageExporterServlet extends SlingAllMethodsServlet {
private final Logger log = LoggerFactory.getLogger(getClass());
@Override
protected void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response)
throws ServletException, IOException {
ReplicationPackageExporter replicationPackageExporter = request
.getResource()
.adaptTo(ReplicationPackageExporter.class);
final long start = System.currentTimeMillis();
response.setContentType(ContentType.APPLICATION_OCTET_STREAM.toString());
ReplicationRequest replicationRequest = RequestUtils.fromServletRequest(request);
ResourceResolver resourceResolver = request.getResourceResolver();
int consumed = 0;
int fetched = 0;
try {
// get all items
List<ReplicationPackage> replicationPackages = replicationPackageExporter.exportPackages(resourceResolver, replicationRequest);
fetched = replicationPackages.size();
if (replicationPackages.size() > 0) {
log.info("{} package(s) available for fetching", replicationPackages.size());
for (ReplicationPackage replicationPackage : replicationPackages) {
if (replicationPackage != null) {
InputStream inputStream = null;
int bytesCopied = -1;
try {
inputStream = replicationPackage.createInputStream();
bytesCopied = IOUtils.copy(inputStream, response.getOutputStream());
} finally {
IOUtils.closeQuietly(inputStream);
}
// delete the package permanently
replicationPackage.delete();
// everything ok
response.setStatus(200);
log.info("{} bytes written into the response", bytesCopied);
} else {
log.warn("fetched a null package");
}
}
} else {
response.setStatus(204);
log.info("nothing to fetch");
}
} catch (Exception e) {
response.setStatus(503);
log.error("error while exporting from {}", request.getRequestURL(), e);
} finally {
long end = System.currentTimeMillis();
log.info("Processed replication export request in {} ms: : consumed {} of {}", new Object[]{end - start, consumed, fetched});
}
}
}