Rename RobinEngine and friends to InternalEngine

Closes #4633

docs/reference/indices/refresh.asciidoc

@@ -4,7 +4,7 @@
 The refresh API allows to explicitly refresh one or more index, making
 all operations performed since the last refresh available for search.
 The (near) real-time capabilities depend on the index engine used. For
-example, the robin one requires refresh to be called, but by default a
+example, the internal one requires refresh to be called, but by default a
 refresh is scheduled periodically.
 
 [source,js]

src/main/java/org/elasticsearch/action/admin/indices/refresh/RefreshRequest.java

@@ -27,7 +27,7 @@ import java.io.IOException;
 
 /**
  * A refresh request making all operations performed since the last refresh available for search. The (near) real-time
- * capabilities depends on the index engine used. For example, the robin one requires refresh to be called, but by
+ * capabilities depends on the index engine used. For example, the internal one requires refresh to be called, but by
  * default a refresh is scheduled periodically.
  *
  * @see org.elasticsearch.client.Requests#refreshRequest(String...)

src/main/java/org/elasticsearch/action/admin/indices/refresh/RefreshRequestBuilder.java

@@ -26,7 +26,7 @@ import org.elasticsearch.client.internal.InternalIndicesAdminClient;
 
 /**
  * A refresh request making all operations performed since the last refresh available for search. The (near) real-time
- * capabilities depends on the index engine used. For example, the robin one requires refresh to be called, but by
+ * capabilities depends on the index engine used. For example, the internal one requires refresh to be called, but by
  * default a refresh is scheduled periodically.
  */
 public class RefreshRequestBuilder extends BroadcastOperationRequestBuilder<RefreshRequest, RefreshResponse, RefreshRequestBuilder> {

src/main/java/org/elasticsearch/index/deletionpolicy/SnapshotDeletionPolicy.java

@@ -136,7 +136,7 @@ public class SnapshotDeletionPolicy extends AbstractESDeletionPolicy {
     @Override
     public IndexDeletionPolicy clone() {
        // Lucene IW makes a clone internally but since we hold on to this instance 
-       // the clone will just be the identity. See RobinEngine recovery why we need this.
+       // the clone will just be the identity. See InternalEngine recovery why we need this.
        return this;
     }
 

src/main/java/org/elasticsearch/index/engine/IndexEngineModule.java

@@ -24,8 +24,8 @@ import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.common.inject.Module;
 import org.elasticsearch.common.inject.SpawnModules;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.index.engine.robin.RobinEngineModule;
+import org.elasticsearch.index.engine.internal.InternalEngineModule;
-import org.elasticsearch.index.engine.robin.RobinIndexEngineModule;
+import org.elasticsearch.index.engine.internal.InternalIndexEngineModule;
 
 import static org.elasticsearch.common.inject.Modules.createModule;
 
@@ -37,8 +37,8 @@ public class IndexEngineModule extends AbstractModule implements SpawnModules {
     public static final class EngineSettings {
         public static final String ENGINE_TYPE = "index.engine.type";
         public static final String INDEX_ENGINE_TYPE = "index.index_engine.type";
-        public static final Class<? extends Module> DEFAULT_INDEX_ENGINE = RobinIndexEngineModule.class;
+        public static final Class<? extends Module> DEFAULT_INDEX_ENGINE = InternalIndexEngineModule.class;
-        public static final Class<? extends Module> DEFAULT_ENGINE = RobinEngineModule.class;
+        public static final Class<? extends Module> DEFAULT_ENGINE = InternalEngineModule.class;
     }
 
     private final Settings settings;

src/main/java/org/elasticsearch/index/engine/internal/InternalEngine.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import com.google.common.collect.Lists;
 import org.apache.lucene.index.*;
@@ -89,7 +89,7 @@ import java.util.concurrent.locks.ReentrantReadWriteLock;
 /**
  *
  */
-public class RobinEngine extends AbstractIndexShardComponent implements Engine {
+public class InternalEngine extends AbstractIndexShardComponent implements Engine {
 
     private volatile ByteSizeValue indexingBufferSize;
     private volatile int indexConcurrency;
@@ -119,7 +119,7 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
 
     private volatile IndexWriter indexWriter;
 
-    private final SearcherFactory searcherFactory = new RobinSearchFactory();
+    private final SearcherFactory searcherFactory = new SearchFactory();
     private volatile SearcherManager searcherManager;
 
     private volatile boolean closed = false;
@@ -159,7 +159,7 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
     private SegmentInfos lastCommittedSegmentInfos;
 
     @Inject
-    public RobinEngine(ShardId shardId, @IndexSettings Settings indexSettings, ThreadPool threadPool,
+    public InternalEngine(ShardId shardId, @IndexSettings Settings indexSettings, ThreadPool threadPool,
                           IndexSettingsService indexSettingsService, ShardIndexingService indexingService, @Nullable IndicesWarmer warmer,
                           Store store, SnapshotDeletionPolicy deletionPolicy, Translog translog,
                           MergePolicyProvider mergePolicyProvider, MergeSchedulerProvider mergeScheduler,
@@ -694,7 +694,7 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
     }
 
     protected Searcher newSearcher(String source, IndexSearcher searcher, SearcherManager manager) {
-        return new RobinSearcher(source, searcher, manager);
+        return new EngineSearcher(source, searcher, manager);
     }
 
     @Override
@@ -1409,45 +1409,45 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
 
         @Override
         public void onRefreshSettings(Settings settings) {
-            long gcDeletesInMillis = settings.getAsTime(INDEX_GC_DELETES, TimeValue.timeValueMillis(RobinEngine.this.gcDeletesInMillis)).millis();
+            long gcDeletesInMillis = settings.getAsTime(INDEX_GC_DELETES, TimeValue.timeValueMillis(InternalEngine.this.gcDeletesInMillis)).millis();
-            if (gcDeletesInMillis != RobinEngine.this.gcDeletesInMillis) {
+            if (gcDeletesInMillis != InternalEngine.this.gcDeletesInMillis) {
-                logger.info("updating index.gc_deletes from [{}] to [{}]", TimeValue.timeValueMillis(RobinEngine.this.gcDeletesInMillis), TimeValue.timeValueMillis(gcDeletesInMillis));
+                logger.info("updating index.gc_deletes from [{}] to [{}]", TimeValue.timeValueMillis(InternalEngine.this.gcDeletesInMillis), TimeValue.timeValueMillis(gcDeletesInMillis));
-                RobinEngine.this.gcDeletesInMillis = gcDeletesInMillis;
+                InternalEngine.this.gcDeletesInMillis = gcDeletesInMillis;
             }
 
-            final boolean compoundOnFlush = settings.getAsBoolean(INDEX_COMPOUND_ON_FLUSH, RobinEngine.this.compoundOnFlush);
+            final boolean compoundOnFlush = settings.getAsBoolean(INDEX_COMPOUND_ON_FLUSH, InternalEngine.this.compoundOnFlush);
-            if (compoundOnFlush != RobinEngine.this.compoundOnFlush) {
+            if (compoundOnFlush != InternalEngine.this.compoundOnFlush) {
-                logger.info("updating {} from [{}] to [{}]", RobinEngine.INDEX_COMPOUND_ON_FLUSH, RobinEngine.this.compoundOnFlush, compoundOnFlush);
+                logger.info("updating {} from [{}] to [{}]", InternalEngine.INDEX_COMPOUND_ON_FLUSH, InternalEngine.this.compoundOnFlush, compoundOnFlush);
-                RobinEngine.this.compoundOnFlush = compoundOnFlush;
+                InternalEngine.this.compoundOnFlush = compoundOnFlush;
                 indexWriter.getConfig().setUseCompoundFile(compoundOnFlush);
             }
 
-            int indexConcurrency = settings.getAsInt(INDEX_INDEX_CONCURRENCY, RobinEngine.this.indexConcurrency);
+            int indexConcurrency = settings.getAsInt(INDEX_INDEX_CONCURRENCY, InternalEngine.this.indexConcurrency);
-            boolean failOnMergeFailure = settings.getAsBoolean(INDEX_FAIL_ON_MERGE_FAILURE, RobinEngine.this.failOnMergeFailure);
+            boolean failOnMergeFailure = settings.getAsBoolean(INDEX_FAIL_ON_MERGE_FAILURE, InternalEngine.this.failOnMergeFailure);
-            String codecName = settings.get(INDEX_CODEC, RobinEngine.this.codecName);
+            String codecName = settings.get(INDEX_CODEC, InternalEngine.this.codecName);
             final boolean codecBloomLoad = settings.getAsBoolean(CodecService.INDEX_CODEC_BLOOM_LOAD, codecService.isLoadBloomFilter());
             boolean requiresFlushing = false;
-            if (indexConcurrency != RobinEngine.this.indexConcurrency ||
+            if (indexConcurrency != InternalEngine.this.indexConcurrency ||
-                    !codecName.equals(RobinEngine.this.codecName) ||
+                    !codecName.equals(InternalEngine.this.codecName) ||
-                    failOnMergeFailure != RobinEngine.this.failOnMergeFailure ||
+                    failOnMergeFailure != InternalEngine.this.failOnMergeFailure ||
                     codecBloomLoad != codecService.isLoadBloomFilter()) {
                 rwl.readLock().lock();
                 try {
-                    if (indexConcurrency != RobinEngine.this.indexConcurrency) {
+                    if (indexConcurrency != InternalEngine.this.indexConcurrency) {
-                        logger.info("updating index.index_concurrency from [{}] to [{}]", RobinEngine.this.indexConcurrency, indexConcurrency);
+                        logger.info("updating index.index_concurrency from [{}] to [{}]", InternalEngine.this.indexConcurrency, indexConcurrency);
-                        RobinEngine.this.indexConcurrency = indexConcurrency;
+                        InternalEngine.this.indexConcurrency = indexConcurrency;
                         // we have to flush in this case, since it only applies on a new index writer
                         requiresFlushing = true;
                     }
-                    if (!codecName.equals(RobinEngine.this.codecName)) {
+                    if (!codecName.equals(InternalEngine.this.codecName)) {
-                        logger.info("updating index.codec from [{}] to [{}]", RobinEngine.this.codecName, codecName);
+                        logger.info("updating index.codec from [{}] to [{}]", InternalEngine.this.codecName, codecName);
-                        RobinEngine.this.codecName = codecName;
+                        InternalEngine.this.codecName = codecName;
                         // we want to flush in this case, so the new codec will be reflected right away...
                         requiresFlushing = true;
                     }
-                    if (failOnMergeFailure != RobinEngine.this.failOnMergeFailure) {
+                    if (failOnMergeFailure != InternalEngine.this.failOnMergeFailure) {
-                        logger.info("updating {} from [{}] to [{}]", RobinEngine.INDEX_FAIL_ON_MERGE_FAILURE, RobinEngine.this.failOnMergeFailure, failOnMergeFailure);
+                        logger.info("updating {} from [{}] to [{}]", InternalEngine.INDEX_FAIL_ON_MERGE_FAILURE, InternalEngine.this.failOnMergeFailure, failOnMergeFailure);
-                        RobinEngine.this.failOnMergeFailure = failOnMergeFailure;
+                        InternalEngine.this.failOnMergeFailure = failOnMergeFailure;
                     }
                     if (codecBloomLoad != codecService.isLoadBloomFilter()) {
                         logger.info("updating {} from [{}] to [{}]", CodecService.INDEX_CODEC_BLOOM_LOAD, codecService.isLoadBloomFilter(), codecBloomLoad);
@@ -1469,13 +1469,13 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
         return new SearcherManager(indexWriter, true, searcherFactory);
     }
 
-    static class RobinSearcher implements Searcher {
+    static class EngineSearcher implements Searcher {
 
         private final String source;
         private final IndexSearcher searcher;
         private final SearcherManager manager;
 
-        private RobinSearcher(String source, IndexSearcher searcher, SearcherManager manager) {
+        private EngineSearcher(String source, IndexSearcher searcher, SearcherManager manager) {
             this.source = source;
             this.searcher = searcher;
             this.manager = manager;
@@ -1542,7 +1542,7 @@ public class RobinEngine extends AbstractIndexShardComponent implements Engine {
         }
     }
 
-    class RobinSearchFactory extends SearcherFactory {
+    class SearchFactory extends SearcherFactory {
 
         @Override
         public IndexSearcher newSearcher(IndexReader reader) throws IOException {

src/main/java/org/elasticsearch/index/engine/internal/InternalEngineModule.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.index.engine.Engine;
@@ -25,10 +25,10 @@ import org.elasticsearch.index.engine.Engine;
 /**
  *
  */
-public class RobinEngineModule extends AbstractModule {
+public class InternalEngineModule extends AbstractModule {
 
     @Override
     protected void configure() {
-        bind(Engine.class).to(RobinEngine.class).asEagerSingleton();
+        bind(Engine.class).to(InternalEngine.class).asEagerSingleton();
     }
 }

src/main/java/org/elasticsearch/index/engine/internal/InternalIndexEngine.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
@@ -31,14 +31,14 @@ import static org.elasticsearch.common.settings.ImmutableSettings.Builder.EMPTY_
 /**
  *
  */
-public class RobinIndexEngine extends AbstractIndexComponent implements IndexEngine {
+public class InternalIndexEngine extends AbstractIndexComponent implements IndexEngine {
 
-    public RobinIndexEngine(Index index) {
+    public InternalIndexEngine(Index index) {
         this(index, EMPTY_SETTINGS);
     }
 
     @Inject
-    public RobinIndexEngine(Index index, @IndexSettings Settings indexSettings) {
+    public InternalIndexEngine(Index index, @IndexSettings Settings indexSettings) {
         super(index, indexSettings);
     }
 

src/main/java/org/elasticsearch/index/engine/internal/InternalIndexEngineModule.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.index.engine.IndexEngine;
@@ -25,10 +25,10 @@ import org.elasticsearch.index.engine.IndexEngine;
 /**
  *
  */
-public class RobinIndexEngineModule extends AbstractModule {
+public class InternalIndexEngineModule extends AbstractModule {
 
     @Override
     protected void configure() {
-        bind(IndexEngine.class).to(RobinIndexEngine.class).asEagerSingleton();
+        bind(IndexEngine.class).to(InternalIndexEngine.class).asEagerSingleton();
     }
 }

src/main/java/org/elasticsearch/index/settings/IndexDynamicSettingsModule.java

@@ -29,7 +29,7 @@ import org.elasticsearch.cluster.settings.Validator;
 import org.elasticsearch.common.inject.AbstractModule;
 import org.elasticsearch.gateway.local.LocalGatewayAllocator;
 import org.elasticsearch.index.codec.CodecService;
-import org.elasticsearch.index.engine.robin.RobinEngine;
+import org.elasticsearch.index.engine.internal.InternalEngine;
 import org.elasticsearch.index.gateway.IndexShardGatewayService;
 import org.elasticsearch.index.indexing.slowlog.ShardSlowLogIndexingService;
 import org.elasticsearch.index.merge.policy.LogByteSizeMergePolicyProvider;
@@ -80,12 +80,12 @@ public class IndexDynamicSettingsModule extends AbstractModule {
         indexDynamicSettings.addDynamicSetting(LogDocMergePolicyProvider.INDEX_MERGE_POLICY_MAX_MERGE_DOCS, Validator.POSITIVE_INTEGER);
         indexDynamicSettings.addDynamicSetting(LogDocMergePolicyProvider.INDEX_MERGE_POLICY_MERGE_FACTOR, Validator.INTEGER_GTE_2);
         indexDynamicSettings.addDynamicSetting(LogDocMergePolicyProvider.INDEX_COMPOUND_FORMAT);
-        indexDynamicSettings.addDynamicSetting(RobinEngine.INDEX_INDEX_CONCURRENCY, Validator.NON_NEGATIVE_INTEGER);
+        indexDynamicSettings.addDynamicSetting(InternalEngine.INDEX_INDEX_CONCURRENCY, Validator.NON_NEGATIVE_INTEGER);
-        indexDynamicSettings.addDynamicSetting(RobinEngine.INDEX_COMPOUND_ON_FLUSH, Validator.BOOLEAN);
+        indexDynamicSettings.addDynamicSetting(InternalEngine.INDEX_COMPOUND_ON_FLUSH, Validator.BOOLEAN);
         indexDynamicSettings.addDynamicSetting(CodecService.INDEX_CODEC_BLOOM_LOAD, Validator.BOOLEAN);
-        indexDynamicSettings.addDynamicSetting(RobinEngine.INDEX_GC_DELETES, Validator.TIME);
+        indexDynamicSettings.addDynamicSetting(InternalEngine.INDEX_GC_DELETES, Validator.TIME);
-        indexDynamicSettings.addDynamicSetting(RobinEngine.INDEX_CODEC);
+        indexDynamicSettings.addDynamicSetting(InternalEngine.INDEX_CODEC);
-        indexDynamicSettings.addDynamicSetting(RobinEngine.INDEX_FAIL_ON_MERGE_FAILURE);
+        indexDynamicSettings.addDynamicSetting(InternalEngine.INDEX_FAIL_ON_MERGE_FAILURE);
         indexDynamicSettings.addDynamicSetting(ShardSlowLogIndexingService.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_WARN, Validator.TIME);
         indexDynamicSettings.addDynamicSetting(ShardSlowLogIndexingService.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_INFO, Validator.TIME);
         indexDynamicSettings.addDynamicSetting(ShardSlowLogIndexingService.INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_DEBUG, Validator.TIME);

src/main/java/org/elasticsearch/index/snapshots/IndexShardRepository.java

@@ -35,7 +35,7 @@ public interface IndexShardRepository {
     /**
      * Creates a snapshot of the shard based on the index commit point.
      * <p/>
-     * The index commit point can be obtained by using {@link org.elasticsearch.index.engine.robin.RobinEngine#snapshotIndex()} method.
+     * The index commit point can be obtained by using {@link org.elasticsearch.index.engine.internal.InternalEngine#snapshotIndex()} method.
      * IndexShardRepository implementations shouldn't release the snapshot index commit point. It is done by the method caller.
      * <p/>
      * As snapshot process progresses, implementation of this method should update {@link IndexShardSnapshotStatus} object and check

src/main/java/org/elasticsearch/search/internal/ContextIndexSearcher.java

@@ -44,7 +44,7 @@ public class ContextIndexSearcher extends IndexSearcher {
     }
 
     /** The wrapped {@link IndexSearcher}. The reason why we sometimes prefer delegating to this searcher instead of <tt>super</tt> is that
-     *  this instance may have more assertions, for example if it comes from MockRobinEngine which wraps the IndexSearcher into an
+     *  this instance may have more assertions, for example if it comes from MockInternalEngine which wraps the IndexSearcher into an
      *  AssertingIndexSearcher. */
     private final IndexSearcher in;
 

src/test/java/org/elasticsearch/benchmark/search/aggregations/HistogramAggregationSearchBenchmark.java

@@ -56,7 +56,7 @@ public class HistogramAggregationSearchBenchmark {
 
     public static void main(String[] args) throws Exception {
         Settings settings = settingsBuilder()
-                .put("index.engine.robin.refreshInterval", "-1")
+                .put("refresh_interval", "-1")
                 .put("gateway.type", "local")
                 .put(SETTING_NUMBER_OF_SHARDS, 2)
                 .put(SETTING_NUMBER_OF_REPLICAS, 1)

src/test/java/org/elasticsearch/benchmark/search/child/ChildSearchAndIndexingBenchmark.java

@@ -59,7 +59,7 @@ public class ChildSearchAndIndexingBenchmark {
 
     public static void main(String[] args) throws Exception {
         Settings settings = settingsBuilder()
-                .put("index.engine.robin.refreshInterval", "-1")
+                .put("refresh_interval", "-1")
                 .put("gateway.type", "local")
                 .put(SETTING_NUMBER_OF_SHARDS, 1)
                 .put(SETTING_NUMBER_OF_REPLICAS, 0)

src/test/java/org/elasticsearch/benchmark/search/child/ChildSearchBenchmark.java

@@ -51,7 +51,7 @@ public class ChildSearchBenchmark {
 
     public static void main(String[] args) throws Exception {
         Settings settings = settingsBuilder()
-                .put("index.engine.robin.refreshInterval", "-1")
+                .put("index.refresh_interval", "-1")
                 .put("gateway.type", "local")
                 .put(SETTING_NUMBER_OF_SHARDS, 1)
                 .put(SETTING_NUMBER_OF_REPLICAS, 0)

src/test/java/org/elasticsearch/benchmark/search/child/ChildSearchShortCircuitBenchmark.java

@@ -51,7 +51,7 @@ public class ChildSearchShortCircuitBenchmark {
 
     public static void main(String[] args) throws Exception {
         Settings settings = settingsBuilder()
-                .put("index.engine.robin.refreshInterval", "-1")
+                .put("index.refresh_interval", "-1")
                 .put("gateway.type", "local")
                 .put(SETTING_NUMBER_OF_SHARDS, 1)
                 .put(SETTING_NUMBER_OF_REPLICAS, 0)

src/test/java/org/elasticsearch/benchmark/search/nested/NestedSearchBenchMark.java

@@ -47,7 +47,7 @@ public class NestedSearchBenchMark {
 
     public static void main(String[] args) throws Exception {
         Settings settings = settingsBuilder()
-                .put("index.engine.robin.refreshInterval", "-1")
+                .put("index.refresh_interval", "-1")
                 .put("gateway.type", "local")
                 .put(SETTING_NUMBER_OF_SHARDS, 1)
                 .put(SETTING_NUMBER_OF_REPLICAS, 0)

src/test/java/org/elasticsearch/benchmark/stress/NodesStressTest.java

@@ -117,7 +117,7 @@ public class NodesStressTest {
 
     public NodesStressTest build(Settings settings) throws Exception {
         settings = settingsBuilder()
-//                .put("index.engine.robin.refreshInterval", 1, TimeUnit.SECONDS)
+//                .put("index.refresh_interval", 1, TimeUnit.SECONDS)
                 .put(SETTING_NUMBER_OF_SHARDS, 5)
                 .put(SETTING_NUMBER_OF_REPLICAS, 1)
                 .put(settings)

src/test/java/org/elasticsearch/index/engine/internal/InternalEngineIntegrationTest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import com.google.common.base.Predicate;
 import org.apache.lucene.util.LuceneTestCase.Slow;
@@ -45,14 +45,14 @@ import java.util.Collection;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertHitCount;
 
-public class RobinEngineIntegrationTest extends ElasticsearchIntegrationTest {
+public class InternalEngineIntegrationTest extends ElasticsearchIntegrationTest {
 
     @Test
     @Slow
     public void testSettingLoadBloomFilterDefaultTrue() throws Exception {
-        Field allowRamBytesUsed = RobinEngine.class.getDeclaredField("allowRamBytesUsed");
+        Field allowRamBytesUsed = InternalEngine.class.getDeclaredField("allowRamBytesUsed");
         allowRamBytesUsed.setAccessible(true);
-        allowRamBytesUsed.set(RobinEngine.class, Boolean.TRUE);
+        allowRamBytesUsed.set(InternalEngine.class, Boolean.TRUE);
 
         try {
             client().admin().indices().prepareCreate("test").setSettings(ImmutableSettings.builder().put("number_of_replicas", 0).put("number_of_shards", 1)).get();
@@ -87,16 +87,16 @@ public class RobinEngineIntegrationTest extends ElasticsearchIntegrationTest {
                 }
             });
         } finally {
-            allowRamBytesUsed.set(RobinEngine.class, Boolean.FALSE);
+            allowRamBytesUsed.set(InternalEngine.class, Boolean.FALSE);
         }
     }
 
     @Test
     @Slow
     public void testSettingLoadBloomFilterDefaultFalse() throws Exception {
-        Field allowRamBytesUsed = RobinEngine.class.getDeclaredField("allowRamBytesUsed");
+        Field allowRamBytesUsed = InternalEngine.class.getDeclaredField("allowRamBytesUsed");
         allowRamBytesUsed.setAccessible(true);
-        allowRamBytesUsed.set(RobinEngine.class, Boolean.TRUE);
+        allowRamBytesUsed.set(InternalEngine.class, Boolean.TRUE);
         try {
             client().admin().indices().prepareCreate("test").setSettings(ImmutableSettings.builder().put("number_of_replicas", 0).put("number_of_shards", 1).put(CodecService.INDEX_CODEC_BLOOM_LOAD, false)).get();
             client().prepareIndex("test", "foo").setSource("field", "foo").get();
@@ -131,7 +131,7 @@ public class RobinEngineIntegrationTest extends ElasticsearchIntegrationTest {
                 }
             });
         } finally {
-            allowRamBytesUsed.set(RobinEngine.class, Boolean.FALSE);
+            allowRamBytesUsed.set(InternalEngine.class, Boolean.FALSE);
         }
 
     }
@@ -143,13 +143,13 @@ public class RobinEngineIntegrationTest extends ElasticsearchIntegrationTest {
         refresh();
         assertTotalCompoundSegments(1, 1, "test");
         client().admin().indices().prepareUpdateSettings("test")
-                .setSettings(ImmutableSettings.builder().put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, false)).get();
+                .setSettings(ImmutableSettings.builder().put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, false)).get();
         client().prepareIndex("test", "foo").setSource("field", "foo").get();
         refresh();
         assertTotalCompoundSegments(1, 2, "test");
 
         client().admin().indices().prepareUpdateSettings("test")
-                .setSettings(ImmutableSettings.builder().put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, true)).get();
+                .setSettings(ImmutableSettings.builder().put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, true)).get();
         client().prepareIndex("test", "foo").setSource("field", "foo").get();
         refresh();
         assertTotalCompoundSegments(2, 3, "test");
@@ -186,7 +186,7 @@ public class RobinEngineIntegrationTest extends ElasticsearchIntegrationTest {
                 .put("index.number_of_shards", "1")
                 .put("index.number_of_replicas", "0")
                 .put("gateway.type", "none")
-                .put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, randomBoolean())
+                .put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, randomBoolean())
                 .put("index.warmer.enabled", false)
                 .build()).get());
         NodesInfoResponse nodeInfos = client().admin().cluster().prepareNodesInfo().setJvm(true).get();

src/test/java/org/elasticsearch/index/engine/internal/InternalEngineTests.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.index.engine.robin;
+package org.elasticsearch.index.engine.internal;
 
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.document.Field;
@@ -84,7 +84,7 @@ import static org.hamcrest.Matchers.*;
 /**
  *
  */
-public class RobinEngineTests extends ElasticsearchTestCase {
+public class InternalEngineTests extends ElasticsearchTestCase {
 
     protected final ShardId shardId = new ShardId(new Index("index"), 1);
 
@@ -107,7 +107,7 @@ public class RobinEngineTests extends ElasticsearchTestCase {
     public void setUp() throws Exception {
         super.setUp();
         defaultSettings = ImmutableSettings.builder()
-                .put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, getRandom().nextBoolean())
+                .put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, getRandom().nextBoolean())
                 .build(); // TODO randomize more settings
         threadPool = new ThreadPool();
         store = createStore();
@@ -194,7 +194,7 @@ public class RobinEngineTests extends ElasticsearchTestCase {
     }
 
     protected Engine createEngine(IndexSettingsService indexSettingsService, Store store, Translog translog, MergeSchedulerProvider<?> mergeSchedulerProvider) {
-        return new RobinEngine(shardId, defaultSettings, threadPool, indexSettingsService, new ShardIndexingService(shardId, EMPTY_SETTINGS, new ShardSlowLogIndexingService(shardId, EMPTY_SETTINGS, indexSettingsService)), null, store, createSnapshotDeletionPolicy(), translog, createMergePolicy(), mergeSchedulerProvider,
+        return new InternalEngine(shardId, defaultSettings, threadPool, indexSettingsService, new ShardIndexingService(shardId, EMPTY_SETTINGS, new ShardSlowLogIndexingService(shardId, EMPTY_SETTINGS, indexSettingsService)), null, store, createSnapshotDeletionPolicy(), translog, createMergePolicy(), mergeSchedulerProvider,
                 new AnalysisService(shardId.index()), new SimilarityService(shardId.index()), new CodecService(shardId.index()));
     }
 
@@ -207,7 +207,7 @@ public class RobinEngineTests extends ElasticsearchTestCase {
         List<Segment> segments = engine.segments();
         assertThat(segments.isEmpty(), equalTo(true));
         assertThat(engine.segmentsStats().getCount(), equalTo(0l));
-        final boolean defaultCompound = defaultSettings.getAsBoolean(RobinEngine.INDEX_COMPOUND_ON_FLUSH, true);
+        final boolean defaultCompound = defaultSettings.getAsBoolean(InternalEngine.INDEX_COMPOUND_ON_FLUSH, true);
 
         // create a doc and refresh
         ParsedDocument doc = testParsedDocument("1", "1", "test", null, -1, -1, testDocumentWithTextField(), Lucene.STANDARD_ANALYZER, B_1, false);
@@ -237,7 +237,7 @@ public class RobinEngineTests extends ElasticsearchTestCase {
         assertThat(segments.get(0).getDeletedDocs(), equalTo(0));
         assertThat(segments.get(0).isCompound(), equalTo(defaultCompound));
 
-        engineSettingsService.refreshSettings(ImmutableSettings.builder().put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, false).build());
+        engineSettingsService.refreshSettings(ImmutableSettings.builder().put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, false).build());
 
         ParsedDocument doc3 = testParsedDocument("3", "3", "test", null, -1, -1, testDocumentWithTextField(), Lucene.STANDARD_ANALYZER, B_3, false);
         engine.create(new Engine.Create(null, newUid("3"), doc3));
@@ -280,7 +280,7 @@ public class RobinEngineTests extends ElasticsearchTestCase {
         assertThat(segments.get(1).getDeletedDocs(), equalTo(0));
         assertThat(segments.get(1).isCompound(), equalTo(false));
 
-        engineSettingsService.refreshSettings(ImmutableSettings.builder().put(RobinEngine.INDEX_COMPOUND_ON_FLUSH, true).build());
+        engineSettingsService.refreshSettings(ImmutableSettings.builder().put(InternalEngine.INDEX_COMPOUND_ON_FLUSH, true).build());
         ParsedDocument doc4 = testParsedDocument("4", "4", "test", null, -1, -1, testDocumentWithTextField(), Lucene.STANDARD_ANALYZER, B_3, false);
         engine.create(new Engine.Create(null, newUid("4"), doc4));
         engine.refresh(new Engine.Refresh("test").force(false));

src/test/java/org/elasticsearch/indices/fielddata/breaker/RandomExceptionCircuitBreakerTests.java

@@ -35,7 +35,7 @@ import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.search.sort.SortOrder;
 import org.elasticsearch.test.ElasticsearchIntegrationTest;
-import org.elasticsearch.test.engine.MockRobinEngine;
+import org.elasticsearch.test.engine.MockInternalEngine;
 import org.elasticsearch.test.engine.ThrowingAtomicReaderWrapper;
 import org.elasticsearch.test.junit.annotations.TestLogging;
 import org.elasticsearch.test.store.MockDirectoryHelper;
@@ -167,7 +167,7 @@ public class RandomExceptionCircuitBreakerTests extends ElasticsearchIntegration
     public static final String EXCEPTION_LOW_LEVEL_RATIO_KEY = "index.engine.exception.ratio.low";
 
     // TODO: Generalize this class and add it as a utility
-    public static class RandomExceptionDirectoryReaderWrapper extends MockRobinEngine.DirectoryReaderWrapper {
+    public static class RandomExceptionDirectoryReaderWrapper extends MockInternalEngine.DirectoryReaderWrapper {
         private final Settings settings;
         static class ThrowingSubReaderWrapper extends SubReaderWrapper implements ThrowingAtomicReaderWrapper.Thrower {
             private final Random random;

src/test/java/org/elasticsearch/indices/settings/UpdateSettingsTests.java

@@ -97,7 +97,7 @@ public class UpdateSettingsTests extends ElasticsearchIntegrationTest {
     }
 
     @Test
-    public void testRobinEngineGCDeletesSetting() throws InterruptedException {
+    public void testEngineGCDeletesSetting() throws InterruptedException {
         createIndex("test");
         client().prepareIndex("test", "type", "1").setSource("f", 1).get(); // set version to 1
         client().prepareDelete("test", "type", "1").get(); // sets version to 2

src/test/java/org/elasticsearch/search/basic/SearchWithRandomExceptionsTests.java

@@ -35,7 +35,7 @@ import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.test.ElasticsearchIntegrationTest;
-import org.elasticsearch.test.engine.MockRobinEngine;
+import org.elasticsearch.test.engine.MockInternalEngine;
 import org.elasticsearch.test.engine.ThrowingAtomicReaderWrapper;
 import org.elasticsearch.test.store.MockDirectoryHelper;
 import org.hamcrest.Matchers;
@@ -186,10 +186,10 @@ public class SearchWithRandomExceptionsTests extends ElasticsearchIntegrationTes
         Builder settings = settingsBuilder()
                 .put("index.number_of_shards", numShards)
                 .put("index.number_of_replicas", randomIntBetween(0, 1))
-                .put(MockRobinEngine.READER_WRAPPER_TYPE, RandomExceptionDirectoryReaderWrapper.class.getName())
+                .put(MockInternalEngine.READER_WRAPPER_TYPE, RandomExceptionDirectoryReaderWrapper.class.getName())
                 .put(EXCEPTION_TOP_LEVEL_RATIO_KEY, topLevelRate)
                 .put(EXCEPTION_LOW_LEVEL_RATIO_KEY, lowLevelRate)
-                .put(MockRobinEngine.WRAP_READER_RATIO, 1.0d);
+                .put(MockInternalEngine.WRAP_READER_RATIO, 1.0d);
         logger.info("creating index: [test] using settings: [{}]", settings.build().getAsMap());
         client().admin().indices().prepareCreate("test")
                 .setSettings(settings)
@@ -243,7 +243,7 @@ public class SearchWithRandomExceptionsTests extends ElasticsearchIntegrationTes
     public static final String EXCEPTION_LOW_LEVEL_RATIO_KEY = "index.engine.exception.ratio.low";
 
 
-    public static class RandomExceptionDirectoryReaderWrapper extends MockRobinEngine.DirectoryReaderWrapper {
+    public static class RandomExceptionDirectoryReaderWrapper extends MockInternalEngine.DirectoryReaderWrapper {
         private final Settings settings;
         static class ThrowingSubReaderWrapper extends SubReaderWrapper implements ThrowingAtomicReaderWrapper.Thrower {
              private final Random random;

src/test/java/org/elasticsearch/test/ElasticsearchTestCase.java

@@ -34,7 +34,7 @@ import org.elasticsearch.common.logging.ESLogger;
 import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.util.concurrent.EsAbortPolicy;
 import org.elasticsearch.common.util.concurrent.EsRejectedExecutionException;
-import org.elasticsearch.test.engine.MockRobinEngine;
+import org.elasticsearch.test.engine.MockInternalEngine;
 import org.elasticsearch.test.junit.listeners.LoggingListener;
 import org.elasticsearch.test.store.MockDirectoryHelper;
 import org.junit.AfterClass;
@@ -131,27 +131,27 @@ public abstract class ElasticsearchTestCase extends AbstractRandomizedTest {
         try {
             if (awaitBusy(new Predicate<Object>() {
                 public boolean apply(Object o) {
-                    return MockRobinEngine.INFLIGHT_ENGINE_SEARCHERS.isEmpty();
+                    return MockInternalEngine.INFLIGHT_ENGINE_SEARCHERS.isEmpty();
                 }
             }, 5, TimeUnit.SECONDS)) {
                 return;
             }
         } catch (InterruptedException ex) {
-            if (MockRobinEngine.INFLIGHT_ENGINE_SEARCHERS.isEmpty()) {
+            if (MockInternalEngine.INFLIGHT_ENGINE_SEARCHERS.isEmpty()) {
                 return;
             }
         }
         try {
             RuntimeException ex = null;
             StringBuilder builder = new StringBuilder("Unclosed Searchers instance for shards: [");
-            for (Entry<MockRobinEngine.AssertingSearcher, RuntimeException> entry : MockRobinEngine.INFLIGHT_ENGINE_SEARCHERS.entrySet()) {
+            for (Entry<MockInternalEngine.AssertingSearcher, RuntimeException> entry : MockInternalEngine.INFLIGHT_ENGINE_SEARCHERS.entrySet()) {
                 ex = entry.getValue();
                 builder.append(entry.getKey().shardId()).append(",");
             }
             builder.append("]");
             throw new RuntimeException(builder.toString(), ex);
         } finally {
-            MockRobinEngine.INFLIGHT_ENGINE_SEARCHERS.clear();
+            MockInternalEngine.INFLIGHT_ENGINE_SEARCHERS.clear();
         }
     }
 

src/test/java/org/elasticsearch/test/engine/MockEngineModule.java

@@ -26,6 +26,6 @@ public class MockEngineModule extends AbstractModule {
 
     @Override
     protected void configure() {
-        bind(Engine.class).to(MockRobinEngine.class).asEagerSingleton();
+        bind(Engine.class).to(MockInternalEngine.class).asEagerSingleton();
     }
 }

src/test/java/org/elasticsearch/test/engine/MockInternalEngine.java

@@ -32,7 +32,7 @@ import org.elasticsearch.index.codec.CodecService;
 import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
 import org.elasticsearch.index.engine.Engine;
 import org.elasticsearch.index.engine.EngineException;
-import org.elasticsearch.index.engine.robin.RobinEngine;
+import org.elasticsearch.index.engine.internal.InternalEngine;
 import org.elasticsearch.index.indexing.ShardIndexingService;
 import org.elasticsearch.index.merge.policy.MergePolicyProvider;
 import org.elasticsearch.index.merge.scheduler.MergeSchedulerProvider;
@@ -52,7 +52,7 @@ import java.util.Random;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
-public final class MockRobinEngine extends RobinEngine implements Engine {
+public final class MockInternalEngine extends InternalEngine implements Engine {
     public static final ConcurrentMap<AssertingSearcher, RuntimeException> INFLIGHT_ENGINE_SEARCHERS = new ConcurrentHashMap<AssertingSearcher, RuntimeException>();
     public static final String WRAP_READER_RATIO = "index.engine.mock.random.wrap_reader_ratio";
     public static final String READER_WRAPPER_TYPE = "index.engine.mock.random.wrapper";
@@ -62,7 +62,7 @@ public final class MockRobinEngine extends RobinEngine implements Engine {
     private final Class<? extends FilterDirectoryReader> wrapper;
 
     @Inject
-    public MockRobinEngine(ShardId shardId, @IndexSettings Settings indexSettings, ThreadPool threadPool,
+    public MockInternalEngine(ShardId shardId, @IndexSettings Settings indexSettings, ThreadPool threadPool,
                               IndexSettingsService indexSettingsService, ShardIndexingService indexingService, @Nullable IndicesWarmer warmer, Store store,
                               SnapshotDeletionPolicy deletionPolicy, Translog translog, MergePolicyProvider mergePolicyProvider,
                               MergeSchedulerProvider mergeScheduler, AnalysisService analysisService, SimilarityService similarityService,
@@ -86,7 +86,7 @@ public final class MockRobinEngine extends RobinEngine implements Engine {
         } finally {
             if (logger.isTraceEnabled()) {
                 // log debug if we have pending searchers
-                for (Entry<MockRobinEngine.AssertingSearcher, RuntimeException> entry : MockRobinEngine.INFLIGHT_ENGINE_SEARCHERS.entrySet()) {
+                for (Entry<MockInternalEngine.AssertingSearcher, RuntimeException> entry : MockInternalEngine.INFLIGHT_ENGINE_SEARCHERS.entrySet()) {
                     logger.trace("Unreleased Searchers instance for shard [{}]", entry.getValue(), entry.getKey().shardId);
                 }
             }