pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / index / SerialMergeScheduler.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/SerialMergeScheduler.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/SerialMergeScheduler.java
new file mode 100644 (file)
index 0000000..ece5dce
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/SerialMergeScheduler.java
@@ -0,0 +1,43 @@
+package org.apache.lucene.index;
+
+/**
+ * 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.
+ */
+
+import java.io.IOException;
+
+/** A {@link MergeScheduler} that simply does each merge
+ *  sequentially, using the current thread. */
+public class SerialMergeScheduler extends MergeScheduler {
+
+  /** Just do the merges in sequence. We do this
+   * "synchronized" so that even if the application is using
+   * multiple threads, only one merge may run at a time. */
+  @Override
+  synchronized public void merge(IndexWriter writer)
+    throws CorruptIndexException, IOException {
+
+    while(true) {
+      MergePolicy.OneMerge merge = writer.getNextMerge();
+      if (merge == null)
+        break;
+      writer.merge(merge);
+    }
+  }
+
+  @Override
+  public void close() {}
+}