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authorjhh <jorge.hernandez-herrero@att.com>2021-03-09 10:01:17 -0600
committerjhh <jorge.hernandez-herrero@att.com>2021-03-09 15:03:32 -0600
commit149df90bb72ece740accaf3ea037cf40defcd1bd (patch)
treef0895c1729c06403abecadca1065d3dfc25de35f /policy-core/src/main
parentdd9d31e90873e12623865fb21bf2e4603e3e0f19 (diff)
add no locking feature
It provides an interface to applications for locking purposes that always succeeds. It does not deny acquiring resource locks. Issue-ID: POLICY-3114 Signed-off-by: jhh <jorge.hernandez-herrero@att.com> Change-Id: I6aebb5f40e4176e0ff7b0e6c6d4042a79dd0b7a3 Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Diffstat (limited to 'policy-core/src/main')
-rw-r--r--policy-core/src/main/java/org/onap/policy/drools/core/lock/AlwaysSuccessLock.java64
1 files changed, 64 insertions, 0 deletions
diff --git a/policy-core/src/main/java/org/onap/policy/drools/core/lock/AlwaysSuccessLock.java b/policy-core/src/main/java/org/onap/policy/drools/core/lock/AlwaysSuccessLock.java
new file mode 100644
index 00000000..6b1e1494
--- /dev/null
+++ b/policy-core/src/main/java/org/onap/policy/drools/core/lock/AlwaysSuccessLock.java
@@ -0,0 +1,64 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.core.lock;
+
+import lombok.NonNull;
+
+/**
+ * Lock implementation whose operations always succeed.
+ */
+public class AlwaysSuccessLock extends LockImpl {
+ private static final long serialVersionUID = 1L;
+
+ /**
+ * Overrides parent constructor.
+ */
+ public AlwaysSuccessLock() {
+ setState(LockState.ACTIVE);
+ }
+
+ /**
+ * Overrides parent constructor.
+ */
+ public AlwaysSuccessLock(@NonNull LockState state, @NonNull String resourceId,
+ @NonNull String ownerKey, int holdSec, @NonNull LockCallback callback) {
+ super(state, resourceId, ownerKey, holdSec, callback);
+ if (!isActive()) {
+ throw new IllegalArgumentException("AlwaysSuccessLock can only be created in the active state");
+ }
+ }
+
+ /**
+ * Constructs the object.
+ */
+ public AlwaysSuccessLock(@NonNull String resourceId, @NonNull String ownerKey,
+ int holdSec, @NonNull LockCallback callback) {
+ super(LockState.ACTIVE, resourceId, ownerKey, holdSec, callback);
+ }
+
+ /**
+ * Always returns true.
+ */
+ @Override
+ public synchronized boolean free() {
+ return true;
+ }
+}