Updating cluster RPC code making it work

[controller.git] / opendaylight / md-sal / sal-remoterpc-connector / src / main / java / org / opendaylight / controller / remote / rpc / utils / RandomPrefix.java

diff --git a/opendaylight/md-sal/sal-remoterpc-connector/src/main/java/org/opendaylight/controller/remote/rpc/utils/RandomPrefix.java b/opendaylight/md-sal/sal-remoterpc-connector/src/main/java/org/opendaylight/controller/remote/rpc/utils/RandomPrefix.java
new file mode 100644 (file)
index 0000000..55cc819
--- /dev/null
+++ b/opendaylight/md-sal/sal-remoterpc-connector/src/main/java/org/opendaylight/controller/remote/rpc/utils/RandomPrefix.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2014 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.remote.rpc.utils;
+
+import org.opendaylight.yangtools.yang.common.QName;
+
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.ThreadLocalRandom;
+
+/**
+ * Picked from Yang tools because it was not public class
+ */
+
+final class RandomPrefix {
+    final Map<URI, String> prefixes = new HashMap<>();
+
+    Iterable<Entry<URI, String>> getPrefixes() {
+        return prefixes.entrySet();
+    }
+
+    String encodeQName(final QName qname) {
+        String prefix = prefixes.get(qname.getNamespace());
+        if (prefix == null) {
+            prefix = qname.getPrefix();
+            if (prefix == null || prefix.isEmpty() || prefixes.containsValue(prefix)) {
+                final ThreadLocalRandom random = ThreadLocalRandom.current();
+                do {
+                    final StringBuilder sb = new StringBuilder();
+                    for (int i = 0; i < 4; i++) {
+                        sb.append((char)('a' + random.nextInt(25)));
+                    }
+
+                    prefix = sb.toString();
+                } while (prefixes.containsValue(prefix));
+            }
+
+            prefixes.put(qname.getNamespace(), prefix);
+        }
+
+        return prefix + ':' + qname.getLocalName();
+    }
+}