1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// Copyright (C) 2013 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.google.gerrit.server.project;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.project.DeleteBranch.Input;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import org.eclipse.jgit.errors.LockFailedException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
@Singleton
public class DeleteBranch implements RestModifyView<BranchResource, Input> {
private static final Logger log = LoggerFactory.getLogger(DeleteBranch.class);
private static final int MAX_LOCK_FAILURE_CALLS = 10;
private static final long SLEEP_ON_LOCK_FAILURE_MS = 15;
public static class Input {
}
private final Provider<IdentifiedUser> identifiedUser;
private final GitRepositoryManager repoManager;
private final Provider<InternalChangeQuery> queryProvider;
private final GitReferenceUpdated referenceUpdated;
private final RefValidationHelper refDeletionValidator;
@Inject
DeleteBranch(Provider<IdentifiedUser> identifiedUser,
GitRepositoryManager repoManager,
Provider<InternalChangeQuery> queryProvider,
GitReferenceUpdated referenceUpdated,
RefValidationHelper.Factory refHelperFactory) {
this.identifiedUser = identifiedUser;
this.repoManager = repoManager;
this.queryProvider = queryProvider;
this.referenceUpdated = referenceUpdated;
this.refDeletionValidator =
refHelperFactory.create(ReceiveCommand.Type.DELETE);
}
@Override
public Response<?> apply(BranchResource rsrc, Input input) throws AuthException,
ResourceConflictException, OrmException, IOException {
if (!rsrc.getControl().controlForRef(rsrc.getBranchKey()).canDelete()) {
throw new AuthException("Cannot delete branch");
}
if (!queryProvider.get().setLimit(1)
.byBranchOpen(rsrc.getBranchKey()).isEmpty()) {
throw new ResourceConflictException("branch " + rsrc.getBranchKey()
+ " has open changes");
}
try (Repository r = repoManager.openRepository(rsrc.getNameKey())) {
RefUpdate.Result result;
String ref = rsrc.getRef();
RefUpdate u = r.updateRef(ref);
u.setExpectedOldObjectId(r.exactRef(ref).getObjectId());
u.setNewObjectId(ObjectId.zeroId());
u.setForceUpdate(true);
refDeletionValidator.validateRefOperation(
rsrc.getName(), identifiedUser.get(), u);
int remainingLockFailureCalls = MAX_LOCK_FAILURE_CALLS;
for (;;) {
try {
result = u.delete();
} catch (LockFailedException e) {
result = RefUpdate.Result.LOCK_FAILURE;
} catch (IOException e) {
log.error("Cannot delete " + rsrc.getBranchKey(), e);
throw e;
}
if (result == RefUpdate.Result.LOCK_FAILURE
&& --remainingLockFailureCalls > 0) {
try {
Thread.sleep(SLEEP_ON_LOCK_FAILURE_MS);
} catch (InterruptedException ie) {
// ignore
}
} else {
break;
}
}
switch (result) {
case NEW:
case NO_CHANGE:
case FAST_FORWARD:
case FORCED:
referenceUpdated.fire(rsrc.getNameKey(), u, ReceiveCommand.Type.DELETE,
identifiedUser.get().getAccount());
break;
case REJECTED_CURRENT_BRANCH:
log.error("Cannot delete " + rsrc.getBranchKey() + ": " + result.name());
throw new ResourceConflictException("cannot delete current branch");
case IO_FAILURE:
case LOCK_FAILURE:
case NOT_ATTEMPTED:
case REJECTED:
case RENAMED:
default:
log.error("Cannot delete " + rsrc.getBranchKey() + ": " + result.name());
throw new ResourceConflictException("cannot delete branch: " + result.name());
}
}
return Response.none();
}
}
|
