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-rw-r--r--feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/DistributedLockingFeature.java8
-rw-r--r--feature-distributed-locking/src/main/java/org/onap/policy/distributed/locking/TargetLock.java41
2 files changed, 49 insertions, 0 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 88035ca7..f1c8b687 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
@@ -73,6 +73,14 @@ public class DistributedLockingFeature implements PolicyEngineFeatureAPI, Policy
return(tLock.lock(holdSec) ? OperResult.OPER_ACCEPTED : OperResult.OPER_DENIED);
}
+
+ @Override
+ public OperResult beforeRefresh(String resourceId, String owner, int holdSec) {
+
+ TargetLock tLock = new TargetLock(resourceId, uuid, owner, dataSource);
+
+ return(tLock.refresh(holdSec) ? OperResult.OPER_ACCEPTED : OperResult.OPER_DENIED);
+ }
@Override
public OperResult beforeUnlock(String resourceId, String owner) {
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 fe6f2fe0..1db34538 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
@@ -73,6 +73,17 @@ public class TargetLock {
return grabLock(holdSec);
}
+
+ /**
+ * refresh a lock
+ *
+ * @param holdSec the amount of time, in seconds, that the lock should be held
+ * @return {@code true} if the lock was refreshed, {@code false} if the resource is
+ * not currently locked by the given owner
+ */
+ public boolean refresh(int holdSec) {
+ return updateLock(holdSec);
+ }
/**
* Unlock a resource by deleting it's associated record in the db
@@ -158,6 +169,36 @@ public class TargetLock {
}
}
+
+ /**
+ * Updates the DB record associated with the lock.
+ *
+ * @param holdSec the amount of time, in seconds, that the lock should be held
+ * @return {@code true} if the record was updated, {@code false} otherwise
+ */
+ private boolean updateLock(int holdSec) {
+
+ try (Connection conn = dataSource.getConnection();
+
+ PreparedStatement updateStatement = conn.prepareStatement(
+ "UPDATE pooling.locks SET host = ?, owner = ?, expirationTime = timestampadd(second, ?, now()) WHERE resourceId = ? AND owner = ? AND expirationTime >= now()")) {
+
+ int i = 1;
+ updateStatement.setString(i++, this.uuid.toString());
+ updateStatement.setString(i++, this.owner);
+ updateStatement.setInt(i++, holdSec);
+ updateStatement.setString(i++, this.resourceId);
+ updateStatement.setString(i++, this.owner);
+
+ // refresh succeeded iff a record was updated
+ return (updateStatement.executeUpdate() == 1);
+
+ } catch (SQLException e) {
+ logger.error("error in TargetLock.refreshLock()", e);
+ return false;
+ }
+
+ }
/**
*To remove a lock we simply delete the record from the db