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Upgrade Guava and make a simple accessor for building cycle-detecting locks.

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Mike Hearn 2013-02-27 15:18:38 +01:00 committed by Mike Hearn
parent d309863560
commit 9d6a3cc1e9
2 changed files with 11 additions and 1 deletions
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2
core/pom.xml
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@ -184,7 +184,7 @@
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>11.0</version>
<version>13.0</version>
</dependency>
</dependencies>

10
core/src/main/java/com/google/bitcoin/core/Utils.java
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@ -16,6 +16,7 @@
package com.google.bitcoin.core;
import com.google.common.util.concurrent.CycleDetectingLockFactory;
import org.spongycastle.crypto.digests.RIPEMD160Digest;
import org.spongycastle.util.encoders.Hex;
@ -27,6 +28,9 @@ import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import static com.google.common.base.Preconditions.checkArgument;
@ -35,6 +39,12 @@ import static com.google.common.base.Preconditions.checkArgument;
* To enable debug logging from the library, run with -Dbitcoinj.logging=true on your command line.
*/
public class Utils {
private static CycleDetectingLockFactory lockFactory = CycleDetectingLockFactory.newInstance(CycleDetectingLockFactory.Policies.THROW);
/** Returns a cycle detecting re-entrant named lock. */
public static ReentrantLock lock(String name) {
return lockFactory.newReentrantLock(name);
}
/** The string that prefixes all text messages signed using Bitcoin keys. */
public static final String BITCOIN_SIGNED_MESSAGE_HEADER = "Bitcoin Signed Message:\n";