org.kuali.common.util.sync.DefaultSyncService Maven / Gradle / Ivy
/**
* Copyright 2010-2014 The Kuali Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
*
* 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.kuali.common.util.sync;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.kuali.common.util.CollectionUtils;
import org.kuali.common.util.FileSystemUtils;
import org.kuali.common.util.SyncResult;
import org.kuali.common.util.execute.CopyFileRequest;
import org.kuali.common.util.execute.CopyFileResult;
import org.kuali.common.util.file.DirDiff;
import org.kuali.common.util.file.DirRequest;
import org.kuali.common.util.file.MD5Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DefaultSyncService implements SyncService {
private static final Logger logger = LoggerFactory.getLogger(DefaultSyncService.class);
@Override
public DirDiff getDiff(DirRequest request) {
List requests = Arrays.asList(request);
List results = getDiffs(requests);
return results.get(0);
}
@Override
public List getDiffs(List requests) {
List diffs = new ArrayList();
for (DirRequest request : requests) {
DirDiff diff = FileSystemUtils.getMD5Diff(request);
diffs.add(diff);
}
return diffs;
}
@Override
public SyncResult sync(DirRequest request) {
List requests = Arrays.asList(request);
List results = sync(requests);
return results.get(0);
}
@Override
public List sync(List requests) {
logger.info("Synchronizing {} directories", requests.size());
for (DirRequest request : requests) {
String src = FileSystemUtils.getRelativePathQuietly(request.getRelativeDir(), request.getSourceDir());
String dst = FileSystemUtils.getRelativePathQuietly(request.getRelativeDir(), request.getTargetDir());
logger.info(" [{}] -> [{}]", src, dst);
}
// Scan the file system and record the differences between the directories.
// This does a deep, heavy, scan of both directories.
// It recursively examines the contents of both directories.
// Files that exist in both, are compared for equality using an MD5 checksum
List diffs = getDiffs(requests);
// Use the diff info to generate a list of files to copy
List copyRequests = getCopyFileRequests(diffs);
// Show how many files we are copying
if (copyRequests.size() > 0) {
logger.info("Copying {} files", copyRequests.size());
}
// Copy the files and record the results
List copyResults = FileSystemUtils.copyFiles(copyRequests);
// Log the number of files copied
logger.debug("Copied {} files", copyResults.size());
// Convert the diff information into sync information (adds, deletes, updates)
List results = getSyncResults(diffs);
// return the sync info
return results;
}
protected List getSyncResults(List diffs) {
List results = new ArrayList();
for (DirDiff diff : diffs) {
SyncResult result = getSyncResult(diff);
results.add(result);
}
return results;
}
protected SyncResult getSyncResult(DirDiff diff) {
List adds = FileSystemUtils.getFullPaths(diff.getTargetDir(), diff.getSourceDirOnly());
List deletes = FileSystemUtils.getFullPaths(diff.getTargetDir(), diff.getTargetDirOnly());
List updates = new ArrayList();
for (MD5Result result : diff.getDifferent()) {
updates.add(result.getTarget());
}
SyncResult result = new SyncResult();
result.setAdds(adds);
result.setDeletes(deletes);
result.setUpdates(updates);
return result;
}
protected List getCopyFileRequests(List diffs) {
List copyRequests = new ArrayList();
for (DirDiff diff : diffs) {
List list = getCopyFileRequests(diff);
copyRequests.addAll(list);
}
return copyRequests;
}
/**
* Convert the diff into requests for copying files.
*/
protected List getCopyFileRequests(DirDiff diff) {
// Copy all the files that were in source dir only
List source = getCopyFileRequests(diff, diff.getSourceDirOnly());
// Copy files that are in both directories but have different contents
List different = getCopyFileRequestsForFilesThatAreDifferent(diff.getDifferent());
// Return the combined list
return CollectionUtils.combine(different, source);
}
protected List getCopyFileRequestsForFilesThatAreDifferent(List different) {
List requests = new ArrayList();
for (MD5Result md5Result : different) {
File source = md5Result.getSource();
File target = md5Result.getTarget();
CopyFileRequest request = new CopyFileRequest(source, target);
requests.add(request);
}
return requests;
}
protected List getCopyFileRequests(DirDiff diff, List relativePaths) {
List requests = new ArrayList();
for (String relativePath : relativePaths) {
File source = new File(diff.getSourceDir(), relativePath);
File target = new File(diff.getTargetDir(), relativePath);
CopyFileRequest request = new CopyFileRequest(source, target);
requests.add(request);
}
return requests;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy