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12 package org.eclipse.jgit.internal.storage.file;
13
14 import static org.eclipse.jgit.lib.Constants.encode;
15
16 import java.io.IOException;
17
18 import org.eclipse.jgit.lib.Ref;
19 import org.eclipse.jgit.lib.RefUpdate;
20 import org.eclipse.jgit.lib.ReflogEntry;
21 import org.eclipse.jgit.lib.Repository;
22
23
24 class RefDirectoryUpdate extends RefUpdate {
25 private final RefDirectory database;
26
27 private boolean shouldDeref;
28 private LockFile lock;
29
30 RefDirectoryUpdate(RefDirectory r, Ref ref) {
31 super(ref);
32 database = r;
33 }
34
35
36 @Override
37 protected RefDirectory getRefDatabase() {
38 return database;
39 }
40
41
42 @Override
43 protected Repository getRepository() {
44 return database.getRepository();
45 }
46
47
48 @Override
49 protected boolean tryLock(boolean deref) throws IOException {
50 shouldDeref = deref;
51 Ref dst = getRef();
52 if (deref)
53 dst = dst.getLeaf();
54 String name = dst.getName();
55 lock = new LockFile(database.fileFor(name));
56 if (lock.lock()) {
57 dst = database.findRef(name);
58 setOldObjectId(dst != null ? dst.getObjectId() : null);
59 return true;
60 }
61 return false;
62 }
63
64
65 @Override
66 protected void unlock() {
67 if (lock != null) {
68 lock.unlock();
69 lock = null;
70 }
71 }
72
73
74 @Override
75 protected Result doUpdate(Result status) throws IOException {
76 WriteConfig wc = database.getRepository().getConfig()
77 .get(WriteConfig.KEY);
78
79 lock.setFSync(wc.getFSyncRefFiles());
80 lock.setNeedStatInformation(true);
81 lock.write(getNewObjectId());
82
83 String msg = getRefLogMessage();
84 if (msg != null) {
85 if (isRefLogIncludingResult()) {
86 String strResult = toResultString(status);
87 if (strResult != null) {
88 if (msg.length() > 0)
89 msg = msg + ": " + strResult;
90 else
91 msg = strResult;
92 }
93 }
94 database.log(isForceRefLog(), this, msg, shouldDeref);
95 }
96 if (!lock.commit())
97 return Result.LOCK_FAILURE;
98 database.stored(this, lock.getCommitSnapshot());
99 return status;
100 }
101
102 private String toResultString(Result status) {
103 switch (status) {
104 case FORCED:
105 return ReflogEntry.PREFIX_FORCED_UPDATE;
106 case FAST_FORWARD:
107 return ReflogEntry.PREFIX_FAST_FORWARD;
108 case NEW:
109 return ReflogEntry.PREFIX_CREATED;
110 default:
111 return null;
112 }
113 }
114
115
116 @Override
117 protected Result doDelete(Result status) throws IOException {
118 if (getRef().getStorage() != Ref.Storage.NEW)
119 database.delete(this);
120 return status;
121 }
122
123
124 @Override
125 protected Result doLink(String target) throws IOException {
126 WriteConfig wc = database.getRepository().getConfig()
127 .get(WriteConfig.KEY);
128
129 lock.setFSync(wc.getFSyncRefFiles());
130 lock.setNeedStatInformation(true);
131 lock.write(encode(RefDirectory.SYMREF + target + '\n'));
132
133 String msg = getRefLogMessage();
134 if (msg != null)
135 database.log(isForceRefLog(), this, msg, false);
136 if (!lock.commit())
137 return Result.LOCK_FAILURE;
138 database.storedSymbolicRef(this, lock.getCommitSnapshot(), target);
139
140 if (getRef().getStorage() == Ref.Storage.NEW)
141 return Result.NEW;
142 return Result.FORCED;
143 }
144 }