upgrade to google guava v 15

pom.xml

@@ -158,7 +158,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>14.0.1</version>
+            <version>15.0</version>
             <scope>compile</scope>
             <exclusions>
                 <exclusion>
@@ -976,7 +976,7 @@
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-eclipse-plugin</artifactId>
                     <configuration>
-                      <buildOutputDirectory>eclipse-build</buildOutputDirectory>
+                        <buildOutputDirectory>eclipse-build</buildOutputDirectory>
                     </configuration>
                 </plugin>
             </plugins>

src/main/java/org/elasticsearch/common/collect/MapBackedSet.java

@@ -1,72 +0,0 @@
-/*
- * Licensed to ElasticSearch and Shay Banon under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. ElasticSearch 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.elasticsearch.common.collect;
-
-import java.io.Serializable;
-import java.util.AbstractSet;
-import java.util.Iterator;
-import java.util.Map;
-
-/**
- *
- */
-public class MapBackedSet<E> extends AbstractSet<E> implements Serializable {
-
-    private static final long serialVersionUID = -6761513279741915432L;
-
-    private final Map<E, Boolean> map;
-
-    /**
-     * Creates a new instance which wraps the specified {@code map}.
-     */
-    public MapBackedSet(Map<E, Boolean> map) {
-        this.map = map;
-    }
-
-    @Override
-    public int size() {
-        return map.size();
-    }
-
-    @Override
-    public boolean contains(Object o) {
-        return map.containsKey(o);
-    }
-
-    @Override
-    public boolean add(E o) {
-        return map.put(o, Boolean.TRUE) == null;
-    }
-
-    @Override
-    public boolean remove(Object o) {
-        return map.remove(o) != null;
-    }
-
-    @Override
-    public void clear() {
-        map.clear();
-    }
-
-    @Override
-    public Iterator<E> iterator() {
-        return map.keySet().iterator();
-    }
-}

src/main/java/org/elasticsearch/common/inject/internal/FailableCache.java

@@ -16,10 +16,11 @@
 
 package org.elasticsearch.common.inject.internal;
 
-import com.google.common.base.Function;
-import com.google.common.collect.MapMaker;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
 
-import java.util.Map;
+import java.util.concurrent.ExecutionException;
 
 /**
  * Lazily creates (and caches) values for keys. If creating the value fails (with errors), an
@@ -29,31 +30,35 @@ import java.util.Map;
  */
 public abstract class FailableCache<K, V> {
 
-    private final Map<K, Object> delegate = new MapMaker().makeComputingMap(
-            new Function<K, Object>() {
-                public Object apply(@Nullable K key) {
-                    Errors errors = new Errors();
-                    V result = null;
-                    try {
-                        result = FailableCache.this.create(key, errors);
-                    } catch (ErrorsException e) {
-                        errors.merge(e.getErrors());
-                    }
-                    return errors.hasErrors() ? errors : result;
-                }
-            });
+    private final LoadingCache<K, Object> delegate = CacheBuilder.newBuilder().build(new CacheLoader<K, Object>() {
+        @Override
+        public Object load(K key) throws Exception {
+            Errors errors = new Errors();
+            V result = null;
+            try {
+                result = FailableCache.this.create(key, errors);
+            } catch (ErrorsException e) {
+                errors.merge(e.getErrors());
+            }
+            return errors.hasErrors() ? errors : result;
+        }
+    });
 
     protected abstract V create(K key, Errors errors) throws ErrorsException;
 
     public V get(K key, Errors errors) throws ErrorsException {
-        Object resultOrError = delegate.get(key);
-        if (resultOrError instanceof Errors) {
-            errors.merge((Errors) resultOrError);
-            throw errors.toException();
-        } else {
-            @SuppressWarnings("unchecked") // create returned a non-error result, so this is safe
-                    V result = (V) resultOrError;
-            return result;
+        try {
+            Object resultOrError = delegate.get(key);
+            if (resultOrError instanceof Errors) {
+                errors.merge((Errors) resultOrError);
+                throw errors.toException();
+            } else {
+                @SuppressWarnings("unchecked") // create returned a non-error result, so this is safe
+                        V result = (V) resultOrError;
+                return result;
+            }
+        } catch (ExecutionException e) {
+            throw new RuntimeException(e);
         }
     }
 }

src/main/java/org/elasticsearch/common/util/concurrent/ConcurrentCollections.java

@@ -19,9 +19,9 @@
 
 package org.elasticsearch.common.util.concurrent;
 
+import com.google.common.collect.Sets;
 import jsr166e.ConcurrentHashMapV8;
 import jsr166y.LinkedTransferQueue;
-import org.elasticsearch.common.collect.MapBackedSet;
 
 import java.util.Queue;
 import java.util.Set;
@@ -73,7 +73,7 @@ public abstract class ConcurrentCollections {
     }
 
     public static <V> Set<V> newConcurrentSet() {
-        return new MapBackedSet<V>(ConcurrentCollections.<V, Boolean>newConcurrentMap());
+        return Sets.newSetFromMap(ConcurrentCollections.<V, Boolean>newConcurrentMap());
     }
 
     public static <T> Queue<T> newQueue() {