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-rw-r--r--feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java12
-rw-r--r--feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingProperties.java4
-rw-r--r--feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java70
3 files changed, 44 insertions, 42 deletions
diff --git a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java
index 3d19c873..7906dba7 100644
--- a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java
+++ b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java
@@ -79,7 +79,7 @@ public class DistributedLockingFeature implements PolicyEngineFeatureAPI, Policy
@Override
public Future<Boolean> beforeLock(String resourceId, String owner, Callback callback) {
- TargetLock tLock = new TargetLock(resourceId, this.uuid, owner, lockProps);
+ TargetLock tLock = new TargetLock(resourceId, uuid, owner, lockProps);
return new LockRequestFuture(resourceId, owner, tLock.lock());
@@ -87,21 +87,21 @@ public class DistributedLockingFeature implements PolicyEngineFeatureAPI, Policy
@Override
public Boolean beforeUnlock(String resourceId, String owner) {
- TargetLock tLock = new TargetLock(resourceId, this.uuid, owner, lockProps);
+ TargetLock tLock = new TargetLock(resourceId, uuid, owner, lockProps);
return tLock.unlock();
}
@Override
public Boolean beforeIsLockedBy(String resourceId, String owner) {
- TargetLock tLock = new TargetLock(resourceId, this.uuid, owner, lockProps);
+ TargetLock tLock = new TargetLock(resourceId, uuid, owner, lockProps);
return tLock.isActive();
}
@Override
public Boolean beforeIsLocked(String resourceId) {
- TargetLock tLock = new TargetLock(resourceId, this.uuid, "dummyOwner", lockProps);
+ TargetLock tLock = new TargetLock(resourceId, uuid, "dummyOwner", lockProps);
return tLock.isLocked();
}
@@ -119,7 +119,7 @@ public class DistributedLockingFeature implements PolicyEngineFeatureAPI, Policy
long heartbeatInterval = this.lockProps.getHeartBeatIntervalProperty();
cleanLockTable();
- heartbeat = new Heartbeat(this.uuid, lockProps);
+ heartbeat = new Heartbeat(uuid, lockProps);
this.scheduledExecutorService = Executors.newScheduledThreadPool(1);
this.scheduledExecutorService.scheduleAtFixedRate(heartbeat, heartbeatInterval, heartbeatInterval, TimeUnit.MILLISECONDS);
@@ -148,7 +148,7 @@ public class DistributedLockingFeature implements PolicyEngineFeatureAPI, Policy
PreparedStatement statement = conn.prepareStatement("DELETE FROM pooling.locks WHERE host = ? OR expirationTime < ?");
){
- statement.setString(1, this.uuid.toString());
+ statement.setString(1, uuid.toString());
statement.setLong(2, System.currentTimeMillis());
statement.executeUpdate();
diff --git a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingProperties.java b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingProperties.java
index 139bfb7b..97ba3b10 100644
--- a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingProperties.java
+++ b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingProperties.java
@@ -23,14 +23,10 @@ import java.util.Properties;
import org.onap.policy.common.utils.properties.PropertyConfiguration;
import org.onap.policy.common.utils.properties.exception.PropertyException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
public class DistributedLockingProperties extends PropertyConfiguration{
- private static final Logger logger = LoggerFactory.getLogger(DistributedLockingProperties.class);
-
/**
* Feature properties all begin with this prefix.
*/
diff --git a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java
index ceaa849f..4f09dc2a 100644
--- a/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java
+++ b/feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java
@@ -88,19 +88,21 @@ public class TargetLock {
*/
private boolean grabLock() {
+ // try to insert a record into the table(thereby grabbing the lock)
try (Connection conn = DriverManager.getConnection(lockProps.getDbUrl(), lockProps.getDbUser(),
lockProps.getDbPwd());
- // try to insert a record into the table(thereby grabbing the lock)
- PreparedStatement statement = conn
- .prepareStatement("INSERT INTO pooling.locks (resourceId, host, owner, expirationTime) values (?, ?, ?, ?)");) {
+ PreparedStatement statement = conn.prepareStatement(
+ "INSERT INTO pooling.locks (resourceId, host, owner, expirationTime) values (?, ?, ?, ?)")) {
+
statement.setString(1, this.resourceId);
statement.setString(2, this.uuid.toString());
statement.setString(3, this.owner);
statement.setLong(4, System.currentTimeMillis() + lockProps.getAgingProperty());
-
statement.executeUpdate();
- } catch (SQLException e) {
+ }
+
+ catch (SQLException e) {
logger.error("error in TargetLock.grabLock()", e);
return secondGrab();
}
@@ -117,9 +119,11 @@ public class TargetLock {
try (Connection conn = DriverManager.getConnection(lockProps.getDbUrl(), lockProps.getDbUser(),
lockProps.getDbPwd());
- PreparedStatement updateStatement = conn.prepareStatement("UPDATE pooling.locks SET host = ?, owner = ?, expirationTime = ? WHERE expirationTime <= ? AND resourceId = ?");
-
- PreparedStatement insertStatement = conn.prepareStatement("INSERT INTO pooling.locks (resourceId, host, owner, expirationTime) values (?, ?, ?, ?)");) {
+ PreparedStatement updateStatement = conn.prepareStatement(
+ "UPDATE pooling.locks SET host = ?, owner = ?, expirationTime = ? WHERE expirationTime <= ? AND resourceId = ?");
+
+ PreparedStatement insertStatement = conn.prepareStatement(
+ "INSERT INTO pooling.locks (resourceId, host, owner, expirationTime) values (?, ?, ?, ?)");) {
updateStatement.setString(1, this.uuid.toString());
updateStatement.setString(2, this.owner);
@@ -132,6 +136,7 @@ public class TargetLock {
if (updateStatement.executeUpdate() == 1) {
return true;
}
+
// If our update does not return 1 row, the lock either has not expired
// or it was removed. Try one last grab
else {
@@ -140,7 +145,7 @@ public class TargetLock {
insertStatement.setString(3, this.owner);
insertStatement.setLong(4, System.currentTimeMillis() + lockProps.getAgingProperty());
- // If our insert returns 1 we successfully grabbed the lock
+ // If our insert returns 1 we successfully grabbed the lock
return (insertStatement.executeUpdate() == 1);
}
@@ -159,13 +164,13 @@ public class TargetLock {
try (Connection conn = DriverManager.getConnection(lockProps.getDbUrl(), lockProps.getDbUser(),
lockProps.getDbPwd());
- PreparedStatement deleteStatement = conn
- .prepareStatement("DELETE FROM pooling.locks WHERE resourceId = ? AND owner = ? AND host = ?");) {
+ PreparedStatement deleteStatement = conn.prepareStatement(
+ "DELETE FROM pooling.locks WHERE resourceId = ? AND owner = ? AND host = ?")) {
deleteStatement.setString(1, this.resourceId);
deleteStatement.setString(2, this.owner);
deleteStatement.setString(3, this.uuid.toString());
-
+
return (deleteStatement.executeUpdate() == 1);
} catch (SQLException e) {
@@ -174,34 +179,35 @@ public class TargetLock {
}
}
-
+
/**
* Is the lock active
*/
public boolean isActive() {
-
try (Connection conn = DriverManager.getConnection(lockProps.getDbUrl(), lockProps.getDbUser(),
lockProps.getDbPwd());
- PreparedStatement selectStatement = conn
- .prepareStatement("SELECT * FROM pooling.locks WHERE resourceId = ? AND host = ? AND owner= ? AND expirationTime >= ?");) {
- {
- selectStatement.setString(1, this.resourceId);
- selectStatement.setString(2, this.uuid.toString());
- selectStatement.setString(3, this.owner);
- selectStatement.setLong(4, System.currentTimeMillis());
+ PreparedStatement selectStatement = conn.prepareStatement(
+ "SELECT * FROM pooling.locks WHERE resourceId = ? AND host = ? AND owner= ? AND expirationTime >= ?")) {
- ResultSet result = selectStatement.executeQuery();
+ selectStatement.setString(1, this.resourceId);
+ selectStatement.setString(2, this.uuid.toString());
+ selectStatement.setString(3, this.owner);
+ selectStatement.setLong(4, System.currentTimeMillis());
+ try (ResultSet result = selectStatement.executeQuery()) {
// This will return true if the
// query returned at least one row
return result.first();
-
}
- } catch (SQLException e) {
+
+ }
+
+ catch (SQLException e) {
logger.error("error in TargetLock.isActive()", e);
return false;
}
+
}
/**
@@ -211,20 +217,20 @@ public class TargetLock {
try (Connection conn = DriverManager.getConnection(lockProps.getDbUrl(), lockProps.getDbUser(),
lockProps.getDbPwd());
-
+
PreparedStatement selectStatement = conn
- .prepareStatement("SELECT * FROM pooling.locks WHERE resourceId = ? AND expirationTime >= ?");) {
- {
- selectStatement.setString(1, this.resourceId);
- selectStatement.setLong(2, System.currentTimeMillis());
- ResultSet result = selectStatement.executeQuery();
+ .prepareStatement("SELECT * FROM pooling.locks WHERE resourceId = ? AND expirationTime >= ?")) {
+ selectStatement.setString(1, this.resourceId);
+ selectStatement.setLong(2, System.currentTimeMillis());
+ try (ResultSet result = selectStatement.executeQuery()) {
// This will return true if the
// query returned at least one row
return result.first();
-
}
- } catch (SQLException e) {
+ }
+
+ catch (SQLException e) {
logger.error("error in TargetLock.isActive()", e);
return false;
}