com.caucho.env.repository.FileRepository Maven / Gradle / Ivy
/*
* Copyright (c) 1998-2018 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.env.repository;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
import com.caucho.env.git.GitCommit;
import com.caucho.env.git.GitObjectStream;
import com.caucho.env.git.GitSystem;
import com.caucho.env.git.GitTree;
import com.caucho.env.git.GitType;
import com.caucho.lifecycle.Lifecycle;
import com.caucho.util.Alarm;
import com.caucho.util.AlarmListener;
import com.caucho.util.CurrentTime;
import com.caucho.util.L10N;
import com.caucho.vfs.Path;
import com.caucho.vfs.Vfs;
import com.caucho.vfs.WriteStream;
public class FileRepository extends AbstractRepository
{
private static final L10N L = new L10N(FileRepository.class);
private GitSystem _git;
private AtomicReference _rootHash = new AtomicReference();
private Lifecycle _lifecycle = new Lifecycle();
private long _expireTime = CurrentTime.isTest() ? 15 * 1000L : 3600 * 1000L;
private Alarm _alarm;
public FileRepository()
{
this(GitSystem.getCurrent());
}
public FileRepository(GitSystem git)
{
_git = git;
if (_git == null) {
throw new IllegalStateException(L.l("{0} is required for {1}",
GitSystem.class.getSimpleName(),
getClass().getSimpleName()));
}
}
/**
* Updates the repository
*/
@Override
public void checkForUpdate(boolean isExact)
{
update(getRepositoryRootHash(), false);
}
//
// tag metadata management
//
/**
* Adds a tag
*
* @param tagName the symbolic tag for the repository
* @param contentHash the sha1 hash of the tag's content
* @param commitMessage user's message for the commit
* @param commitMetaData additional commit metadata
*/
@Override
public boolean putTag(String tagName,
String contentHash,
Map commitMetaData)
{
RepositoryTagMap tagMap;
do {
tagMap = addTagData(tagName, contentHash, commitMetaData);
} while (! setTagMap(tagMap));
return true;
}
/**
* Removes a tag
*
* @param tagName the symbolic tag for the repository
* @param commitMessage user's message for the commit
* @param commitMetaData additional metadata
*/
@Override
public boolean removeTag(String tagName,
Map commitMetaData)
{
RepositoryTagMap tagMap;
do {
tagMap = removeTagData(tagName, commitMetaData);
} while (! setTagMap(tagMap));
return true;
}
/**
* Returns the hash stored in the git tag
*/
@Override
public String getRepositoryRootHash()
{
String rootHash = _rootHash.get();
if (rootHash != null && rootHash.length() > 6)
return rootHash;
String value = _git.getTag(getRepositoryTag());
_rootHash.compareAndSet(null, value);
value = _rootHash.get();
if (value != null && value.length() > 6)
return value;
else
return null;
}
/**
* Sets the hash stored in the git tag
*/
@Override
public void setRepositoryRootHash(String sha1)
{
if (sha1 != null) {
_rootHash.set(sha1);
_git.writeTag(getRepositoryTag(), sha1);
_git.writeTag(getRepositoryDebugTag(), sha1);
_git.setHead(getRepositoryDebugTag());
_git.gc(_expireTime);
}
}
/**
* Returns true if the file exists.
*/
@Override
public boolean exists(String hash)
{
if (hash == null)
throw new NullPointerException();
return _git.contains(hash);
}
/**
* Returns true if the file is a blob.
*/
@Override
public GitType getType(String sha1)
{
try {
return _git.contains(sha1) ? _git.objectType(sha1) : null;
} catch (IOException e) {
throw new RepositoryException(e);
}
}
/**
* Adds a path to the repository. If the path is a directory or a
* jar scheme, adds the contents recursively.
*/
@Override
public String addBlob(InputStream is)
{
try {
return _git.writeInputStream(is);
} catch (IOException e) {
throw new RepositoryException(e);
}
}
/**
* Adds a path to the repository. If the path is a directory or a
* jar scheme, adds the contents recursively.
*/
@Override
public String addBlob(InputStream is, long length)
{
try {
return _git.writeInputStream(is, length);
} catch (IOException e) {
throw new RepositoryException(e);
}
}
/**
* Opens a stream to a blob
*/
@Override
public InputStream openBlob(String sha1)
throws IOException
{
return _git.openBlob(sha1);
}
/**
* Opens a stream to the raw git file.
*/
@Override
public InputStream openRawGitFile(String sha1)
throws IOException
{
return _git.openRawGitFile(sha1);
}
/**
* Reads a git tree from the repository
*/
@Override
public GitTree readTree(String sha1)
throws IOException
{
return _git.parseTree(sha1);
}
/**
* Adds a git tree to the repository
*/
@Override
public String addTree(GitTree tree)
throws IOException
{
return _git.writeTree(tree);
}
/**
* Reads a git commit from the repository
*/
@Override
public GitCommit readCommit(String sha1)
throws IOException
{
return _git.parseCommit(sha1);
}
/**
* Adds a git commit to the repository
*/
@Override
public String addCommit(GitCommit commit)
throws IOException
{
return _git.writeCommit(commit);
}
/**
* Writes the git file from the StreamInput
*
* @param sha1 the file hash
* @param is the raw contents for the new file
*/
@Override
public void writeRawGitFile(String sha1, InputStream is)
throws IOException
{
synchronized (_git) {
_git.writeRawGitFile(sha1, is);
}
}
/**
* Writes the git file from the StreamInput
*
* @param sha1 the file hash
* @param is the raw contents for the new file
*/
@Override
public void validateRawGitFile(String sha1)
{
_git.validateRawGitFile(sha1);
}
/**
* Writes the contents to a stream.
*/
@Override
public void writeBlobToStream(String blobHash, OutputStream os)
{
GitObjectStream is = null;
try {
is = _git.open(blobHash);
if (is.getType() != GitType.BLOB)
throw new RepositoryException(L.l("'{0}' is an unexpected type, expected 'blob'",
is.getType()));
WriteStream out = null;
if (os instanceof WriteStream)
out = (WriteStream) os;
else
out = Vfs.openWrite(os);
try {
out.writeStream(is.getInputStream());
} finally {
if (out != null && out != os)
out.close();
}
} catch (IOException e) {
throw new RepositoryException(e);
} finally {
is.close();
}
}
@Override
public boolean isActive()
{
return _lifecycle.isActive();
}
@Override
public void start()
{
if (! _lifecycle.toActive())
return;
super.start();
_git.gc(_expireTime);
_alarm = new Alarm(new GcListener());
_alarm.queue(_expireTime);
}
@Override
public void stop()
{
super.stop();
if (_alarm != null) {
_alarm.dequeue();
}
}
/**
* Expands the repository to the filesystem.
*/
@Override
public void expandToPath(String contentHash, Path path)
{
try {
_git.expandToPath(path, contentHash);
} catch (IOException e) {
throw new RepositoryException(e);
}
}
private class GcListener implements AlarmListener {
@Override
public void handleAlarm(Alarm alarm)
{
if (isActive()) {
try {
_git.gc(_expireTime);
} finally {
if (isActive()) {
alarm.queue(_expireTime);
}
}
}
}
}
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