YARN-1333: Add missing file SchedulerAppUtils

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1535900 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerAppUtils.java

@@ -0,0 +1,48 @@
+/**
+ * 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 org.apache.hadoop.yarn.server.resourcemanager.scheduler;
+
+import org.apache.commons.logging.Log;
+
+public class SchedulerAppUtils {
+
+  public static  boolean isBlacklisted(SchedulerApplication application,
+      SchedulerNode node, Log LOG) {
+    if (application.isBlacklisted(node.getNodeName())) {
+      if (LOG.isDebugEnabled()) {
+        LOG.debug("Skipping 'host' " + node.getNodeName() +
+            " for " + application.getApplicationId() +
+            " since it has been blacklisted");
+      }
+      return true;
+    }
+
+    if (application.isBlacklisted(node.getRackName())) {
+      if (LOG.isDebugEnabled()) {
+        LOG.debug("Skipping 'rack' " + node.getRackName() +
+            " for " + application.getApplicationId() +
+            " since it has been blacklisted");
+      }
+      return true;
+    }
+
+    return false;
+  }
+
+}