BUG 3340 : Improve logging

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / identifiers / TransactionChainIdentifier.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/identifiers/TransactionChainIdentifier.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/identifiers/TransactionChainIdentifier.java
new file mode 100644 (file)
index 0000000..4b1c096
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/identifiers/TransactionChainIdentifier.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.cluster.datastore.identifiers;
+
+import com.google.common.base.Supplier;
+import com.google.common.base.Suppliers;
+import java.util.concurrent.atomic.AtomicLong;
+
+public class TransactionChainIdentifier {
+
+    protected static final String CHAIN_SEPARATOR = "-chn-";
+
+    private final AtomicLong txnCounter = new AtomicLong();
+    private final Supplier<String> stringRepresentation;
+    private final String memberName;
+
+    public TransactionChainIdentifier(final String memberName, final long counter) {
+        this.memberName = memberName;
+        stringRepresentation = Suppliers.memoize(new Supplier<String>() {
+            @Override
+            public String get() {
+                final StringBuilder sb = new StringBuilder();
+                sb.append(memberName).append(CHAIN_SEPARATOR);
+                sb.append(counter);
+                return sb.toString();
+            }
+        });
+    }
+    @Override
+    public String toString() {
+        return stringRepresentation.get();
+    }
+
+    public TransactionIdentifier newTransactionIdentifier(){
+        return new ChainedTransactionIdentifier(this, txnCounter.incrementAndGet());
+    }
+
+    public String getMemberName() {
+        return memberName;
+    }
+}