Prevent Nicira NVP tags from exceeding the 40 character limit.

plugins/network-elements/nicira-nvp/src/com/cloud/network/nicira/NiciraNvpTag.java

@@ -16,7 +16,10 @@
 // under the License.
 package com.cloud.network.nicira;
 
+import org.apache.log4j.Logger;
+
 public class NiciraNvpTag {
+    private static final Logger s_logger = Logger.getLogger(NiciraNvpTag.class);
     private String scope;
     private String tag;
     
@@ -24,7 +27,12 @@ public class NiciraNvpTag {
     
     public NiciraNvpTag(String scope, String tag) {
         this.scope = scope;
-        this.tag = tag;
+        if (tag.length() > 40) {
+            s_logger.warn("tag \"" + tag + "\" too long, truncating to 40 characters");
+            this.tag = tag.substring(0, 40);
+        } else {
+            this.tag = tag;
+        }
     }
     
     public String getScope() {
@@ -40,7 +48,12 @@ public class NiciraNvpTag {
     }
     
     public void setTag(String tag) {
-        this.tag = tag;
+        if (tag.length() > 40) {
+            s_logger.warn("tag \"" + tag + "\" too long, truncating to 40 characters");
+            this.tag = tag.substring(0, 40);
+        } else {
+            this.tag = tag;
+        }
     }
     
 }

plugins/network-elements/nicira-nvp/test/com/cloud/network/nicira/NiciraTagTest.java

@@ -0,0 +1,54 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+package com.cloud.network.nicira;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class NiciraTagTest {
+    @Test
+    public void testCreateTag() {
+        NiciraNvpTag tag = new NiciraNvpTag("scope","tag");
+        assertEquals("scope part set", "scope", tag.getScope());
+        assertEquals("tag part set", "tag", tag.getTag());
+    }
+
+    @Test
+    public void testCreateLongTag() {
+        NiciraNvpTag tag = new NiciraNvpTag("scope","verylongtagthatshouldattheminimumexceedthefortycharacterlenght");
+        assertEquals("scope part set", "scope", tag.getScope());
+        assertEquals("tag part set", "verylongtagthatshouldattheminimumexceedt", tag.getTag());
+    }
+
+    @Test
+    public void testSetTag() {
+        NiciraNvpTag tag = new NiciraNvpTag();
+        tag.setScope("scope");
+        tag.setTag("tag");
+        assertEquals("scope part set", "scope", tag.getScope());
+        assertEquals("tag part set", "tag", tag.getTag());
+    }
+
+    @Test
+    public void testSetLongTag() {
+        NiciraNvpTag tag = new NiciraNvpTag();
+        tag.setScope("scope");
+        tag.setTag("verylongtagthatshouldattheminimumexceedthefortycharacterlenght");
+        assertEquals("scope part set", "scope", tag.getScope());
+        assertEquals("tag part set", "verylongtagthatshouldattheminimumexceedt", tag.getTag());
+    }
+}