1 package org.apache.lucene;
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19 import java.io.IOException;
21 import org.apache.lucene.util.LuceneTestCase;
22 import org.apache.lucene.store.Directory;
23 import org.apache.lucene.store.MockDirectoryWrapper;
24 import org.apache.lucene.store.RAMDirectory;
25 import org.apache.lucene.index.CorruptIndexException;
26 import org.apache.lucene.index.IndexWriter;
27 import org.apache.lucene.index.IndexWriterConfig;
28 import org.apache.lucene.index.LogMergePolicy;
29 import org.apache.lucene.index.MergePolicy;
30 import org.apache.lucene.index.ConcurrentMergeScheduler;
31 import org.apache.lucene.index.MergeScheduler;
32 import org.apache.lucene.index.MergePolicy.OneMerge;
33 import org.apache.lucene.analysis.MockAnalyzer;
34 import org.apache.lucene.document.Document;
35 import org.apache.lucene.document.Field;
38 * Holds tests cases to verify external APIs are accessible
39 * while not being in org.apache.lucene.index package.
41 public class TestMergeSchedulerExternal extends LuceneTestCase {
43 volatile boolean mergeCalled;
44 volatile boolean mergeThreadCreated;
45 volatile boolean excCalled;
47 private class MyMergeScheduler extends ConcurrentMergeScheduler {
49 private class MyMergeThread extends ConcurrentMergeScheduler.MergeThread {
50 public MyMergeThread(IndexWriter writer, MergePolicy.OneMerge merge) throws IOException {
52 mergeThreadCreated = true;
57 protected MergeThread getMergeThread(IndexWriter writer, MergePolicy.OneMerge merge) throws IOException {
58 MergeThread thread = new MyMergeThread(writer, merge);
59 thread.setThreadPriority(getMergeThreadPriority());
60 thread.setDaemon(true);
61 thread.setName("MyMergeThread");
66 protected void handleMergeException(Throwable t) {
71 protected void doMerge(MergePolicy.OneMerge merge) throws IOException {
77 private static class FailOnlyOnMerge extends MockDirectoryWrapper.Failure {
79 public void eval(MockDirectoryWrapper dir) throws IOException {
80 StackTraceElement[] trace = new Exception().getStackTrace();
81 for (int i = 0; i < trace.length; i++) {
82 if ("doMerge".equals(trace[i].getMethodName()))
83 throw new IOException("now failing during merge");
88 public void testSubclassConcurrentMergeScheduler() throws IOException {
89 MockDirectoryWrapper dir = newDirectory();
90 dir.failOn(new FailOnlyOnMerge());
92 Document doc = new Document();
93 Field idField = newField("id", "", Field.Store.YES, Field.Index.NOT_ANALYZED);
96 IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(
97 TEST_VERSION_CURRENT, new MockAnalyzer(random)).setMergeScheduler(new MyMergeScheduler())
98 .setMaxBufferedDocs(2).setRAMBufferSizeMB(IndexWriterConfig.DISABLE_AUTO_FLUSH)
99 .setMergePolicy(newLogMergePolicy()));
100 LogMergePolicy logMP = (LogMergePolicy) writer.getConfig().getMergePolicy();
101 logMP.setMergeFactor(10);
102 for(int i=0;i<20;i++)
103 writer.addDocument(doc);
105 ((MyMergeScheduler) writer.getConfig().getMergeScheduler()).sync();
108 assertTrue(mergeThreadCreated);
109 assertTrue(mergeCalled);
110 assertTrue(excCalled);
114 private static class ReportingMergeScheduler extends MergeScheduler {
117 public void merge(IndexWriter writer) throws CorruptIndexException, IOException {
118 OneMerge merge = null;
119 while ((merge = writer.getNextMerge()) != null) {
121 System.out.println("executing merge " + merge.segString(writer.getDirectory()));
128 public void close() throws CorruptIndexException, IOException {}
132 public void testCustomMergeScheduler() throws Exception {
133 // we don't really need to execute anything, just to make sure the custom MS
134 // compiles. But ensure that it can be used as well, e.g., no other hidden
135 // dependencies or something. Therefore, don't use any random API !
136 Directory dir = new RAMDirectory();
137 IndexWriterConfig conf = new IndexWriterConfig(TEST_VERSION_CURRENT, null);
138 conf.setMergeScheduler(new ReportingMergeScheduler());
139 IndexWriter writer = new IndexWriter(dir, conf);
140 writer.addDocument(new Document());
141 writer.commit(); // trigger flush
142 writer.addDocument(new Document());
143 writer.commit(); // trigger flush