我正在使用SVN工具包从SVN存储库中收集一些指标。我对这个简单的问题感到困惑,无法通过它。
我有一个SVNRepository对象,它为我提供了存储库中所有文件的路径及其不同的修订版本。我想为每个修订版设置以前的修订版值。 如果不查看该文件,我怎么能这样做?或者更确切地说,最好的方法是从我的代码中获得最佳性能?
在分配先前版本时,还应考虑复制/粘贴和移动活动。
答案 0 :(得分:3)
以下技术对我有用。
//This is where I query SVN server
if (entryPath.getType() != SVNLogEntryPath.TYPE_ADDED) {
LogEntryPreviousRevFinder handler = new LogEntryPreviousRevFinder(workingFileName.substring(interestingPath.length()), thisRevision);
//Start checking for previous modified revision for this file in the previous 3 revision.
//If not found try for previous 5 and then 7. If not found till then, put in a warning and continue.
//This is necessary because in SVN a branch operation is performed at the folder level and not file
//hence we need to go further back and find out the revision than was last modified.
for (int i = 3; i <= 7; i+=2) {
repository.log(new String[] {workingFileName}, thisRevision, 0l, true, false, i, handler);
if (handler.isSuccess()) {
prevPath = handler.getPreviousPath();
prevRevision = handler.getPreviousRevision();
break;
} else {
continue;
}
}
if (!handler.isSuccess()) {
log.warn("Failed to find previous revision for file: " + workingFileName
+ " Will contine considering this one as added in this revision");
}
} else {
//Files with SVNLogEntryPath.TYPE_ADDED are either added in this revision
//or are copied or renamed from an existing file. If later, we need to identify the Copy from path
//as that will be the file which will be used for calculating relative metrics and later Flux values
if (entryPath.getCopyPath() != null && entryPath.getCopyPath().trim().length() > 0) {
prevPath = entryPath.getCopyPath();
prevRevision = entryPath.getCopyRevision();
} else {
log.debug("File: " + workingFileName + " added in this revision");
}
}
ISVNLogEntryHandler实现:
//ISVNLogEntryHandler implementation for identifying previous revision
private class LogEntryPreviousRevFinder implements ISVNLogEntryHandler {
private String interestingFile;
private String previousPath;
private long thisRevision;
private long previousRevision;
private boolean isSuccess;
public LogEntryPreviousRevFinder(String interestingFile, long revision) {
this.interestingFile = interestingFile;
this.thisRevision = revision;
isSuccess = false;
}
@Override
public void handleLogEntry(SVNLogEntry logEntry) throws SVNException {
if (isSuccess)
return;
if (thisRevision == logEntry.getRevision())
return;
Set changedPathsSet = logEntry.getChangedPaths().keySet();
for (Iterator changedPaths = changedPathsSet.iterator(); changedPaths.hasNext();) {
SVNLogEntryPath entryPath = (SVNLogEntryPath) logEntry.getChangedPaths().get(changedPaths.next());
String workingFileName = entryPath.getPath();
if (workingFileName.endsWith(interestingFile)) {
previousRevision = logEntry.getRevision();
previousPath = workingFileName;
isSuccess = true;
}
}
}
public long getPreviousRevision() {
return previousRevision;
}
public String getPreviousPath() {
return previousPath;
}
public boolean isSuccess() {
return isSuccess;
}
}
我想知道是否有更好更有效的方法来做到这一点。