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// Copyright (C) 2018 The Android Open Source Project
//
// 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.googlesource.gerrit.plugins.replication;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.flogger.FluentLogger;
import com.google.common.hash.Hashing;
import com.google.gson.Gson;
import com.google.inject.Inject;
import com.google.inject.ProvisionException;
import com.google.inject.Singleton;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.transport.URIish;
@Singleton
public class ReplicationTasksStorage {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private boolean disableDeleteForTesting;
public static class ReplicateRefUpdate {
public final String project;
public final String ref;
public final String uri;
public final String remote;
public ReplicateRefUpdate(String project, String ref, URIish uri, String remote) {
this.project = project;
this.ref = ref;
this.uri = uri.toASCIIString();
this.remote = remote;
}
@Override
public String toString() {
return "ref-update " + project + ":" + ref + " uri:" + uri + " remote:" + remote;
}
}
private static Gson GSON = new Gson();
private final Path refUpdates;
@Inject
ReplicationTasksStorage(ReplicationConfig config) {
refUpdates = config.getEventsDirectory().resolve("ref-updates");
}
public String persist(ReplicateRefUpdate r) {
String json = GSON.toJson(r) + "\n";
String eventKey = sha1(json).name();
Path file = refUpdates().resolve(eventKey);
if (Files.exists(file)) {
return eventKey;
}
try {
logger.atFine().log("CREATE %s (%s:%s => %s)", file, r.project, r.ref, r.uri);
Files.write(file, json.getBytes(UTF_8));
} catch (IOException e) {
logger.atWarning().withCause(e).log("Couldn't persist event %s", json);
}
return eventKey;
}
@VisibleForTesting
public void disableDeleteForTesting(boolean deleteDisabled) {
this.disableDeleteForTesting = deleteDisabled;
}
public void delete(ReplicateRefUpdate r) {
String taskJson = GSON.toJson(r) + "\n";
String taskKey = sha1(taskJson).name();
Path file = refUpdates().resolve(taskKey);
if (disableDeleteForTesting) {
logger.atFine().log("DELETE %s (%s:%s => %s) DISABLED", file, r.project, r.ref, r.uri);
return;
}
try {
logger.atFine().log("DELETE %s (%s:%s => %s)", file, r.project, r.ref, r.uri);
Files.delete(file);
} catch (IOException e) {
logger.atSevere().withCause(e).log("Error while deleting event %s", taskKey);
}
}
public List<ReplicateRefUpdate> list() {
ArrayList<ReplicateRefUpdate> result = new ArrayList<>();
try (DirectoryStream<Path> events = Files.newDirectoryStream(refUpdates())) {
for (Path e : events) {
if (Files.isRegularFile(e)) {
String json = new String(Files.readAllBytes(e), UTF_8);
result.add(GSON.fromJson(json, ReplicateRefUpdate.class));
}
}
} catch (IOException e) {
logger.atSevere().withCause(e).log("Error when firing pending events");
}
return result;
}
@SuppressWarnings("deprecation")
private ObjectId sha1(String s) {
return ObjectId.fromRaw(Hashing.sha1().hashString(s, UTF_8).asBytes());
}
private Path refUpdates() {
try {
return Files.createDirectories(refUpdates);
} catch (IOException e) {
throw new ProvisionException(String.format("Couldn't create %s", refUpdates), e);
}
}
}
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