KYLIN-1894 GlobalDictionary may corrupt when server suddenly crash Signed-off-by: shaofengshi <shaofeng...@apache.org>
Project: http://git-wip-us.apache.org/repos/asf/kylin/repo Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/30fb1e06 Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/30fb1e06 Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/30fb1e06 Branch: refs/heads/master Commit: 30fb1e060b61a099d3cc4b018996fce2395f0c0a Parents: 928baaf Author: sunyerui <sunye...@gmail.com> Authored: Fri Jul 15 12:30:06 2016 +0800 Committer: shaofengshi <shaofeng...@apache.org> Committed: Mon Jul 18 18:50:36 2016 +0800 ---------------------------------------------------------------------- .../apache/kylin/dict/AppendTrieDictionary.java | 65 ++--- .../org/apache/kylin/dict/CachedTreeMap.java | 83 +++++- .../kylin/dict/AppendTrieDictionaryTest.java | 6 +- .../apache/kylin/dict/CachedTreeMapTest.java | 265 +++++++++++++++++++ 4 files changed, 364 insertions(+), 55 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/kylin/blob/30fb1e06/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java ---------------------------------------------------------------------- diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java index 32038bf..4cce586 100644 --- a/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java +++ b/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java @@ -99,13 +99,7 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { } } - public void update(String baseDir, int baseId, int maxId, int maxValueLength, int nValues, BytesConverter bytesConverter, byte[] dictMapBytes) throws IOException { - ByteArrayInputStream buf = new ByteArrayInputStream(dictMapBytes); - DataInputStream input = new DataInputStream(buf); - update(baseDir, baseId, maxId, maxValueLength, nValues, bytesConverter, input); - } - - public void update(String baseDir, int baseId, int maxId, int maxValueLength, int nValues, BytesConverter bytesConverter, DataInput input) throws IOException { + public void update(String baseDir, int baseId, int maxId, int maxValueLength, int nValues, BytesConverter bytesConverter, CachedTreeMap dictMap) throws IOException { this.baseDir = baseDir; this.baseId = baseId; this.maxId = maxId; @@ -114,11 +108,8 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { this.bytesConverter = bytesConverter; int cacheSize = KylinConfig.getInstanceFromEnv().getAppendDictCacheSize(); - if (dictSliceMap == null) { - dictSliceMap = CachedTreeMap.CachedTreeMapBuilder.newBuilder().maxSize(cacheSize).baseDir(baseDir).persistent(true).immutable(true).keyClazz(DictSliceKey.class).valueClazz(DictSlice.class).build(); - } - dictSliceMap.clear(); - ((Writable) dictSliceMap).readFields(input); + dictSliceMap = CachedTreeMap.CachedTreeMapBuilder.newBuilder().maxSize(cacheSize).baseDir(baseDir).persistent(true).immutable(true).keyClazz(DictSliceKey.class).valueClazz(DictSlice.class).build(); + ((CachedTreeMap)dictSliceMap).loadEntry(dictMap); } public byte[] writeDictMap() throws IOException { @@ -777,7 +768,7 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { private AppendTrieDictionary dict; - private TreeMap<DictSliceKey, DictNode> dictSliceMap; + private TreeMap<DictSliceKey, DictNode> mutableDictSliceMap; private static int MAX_ENTRY_IN_SLICE = 10_000_000; private static final double MAX_ENTRY_OVERHEAD_FACTOR = 1.0; @@ -803,9 +794,9 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { MAX_ENTRY_IN_SLICE = KylinConfig.getInstanceFromEnv().getAppendDictEntrySize(); int cacheSize = KylinConfig.getInstanceFromEnv().getAppendDictCacheSize(); // create a new cached map with baseDir - dictSliceMap = CachedTreeMap.CachedTreeMapBuilder.newBuilder().maxSize(cacheSize).baseDir(baseDir).keyClazz(DictSliceKey.class).valueClazz(DictNode.class).persistent(true).immutable(false).build(); + mutableDictSliceMap = CachedTreeMap.CachedTreeMapBuilder.newBuilder().maxSize(cacheSize).baseDir(baseDir).keyClazz(DictSliceKey.class).valueClazz(DictNode.class).persistent(true).immutable(false).build(); if (dictMapBytes != null) { - ((Writable) dictSliceMap).readFields(new DataInputStream(new ByteArrayInputStream(dictMapBytes))); + ((Writable) mutableDictSliceMap).readFields(new DataInputStream(new ByteArrayInputStream(dictMapBytes))); } } @@ -819,23 +810,23 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { } maxValueLength = Math.max(maxValueLength, value.length); - if (dictSliceMap.isEmpty()) { + if (mutableDictSliceMap.isEmpty()) { DictNode root = new DictNode(new byte[0], false); - dictSliceMap.put(DictSliceKey.wrap(new byte[0]), root); + mutableDictSliceMap.put(DictSliceKey.wrap(new byte[0]), root); } - DictSliceKey sliceKey = dictSliceMap.floorKey(DictSliceKey.wrap(value)); + DictSliceKey sliceKey = mutableDictSliceMap.floorKey(DictSliceKey.wrap(value)); if (sliceKey == null) { - sliceKey = dictSliceMap.firstKey(); + sliceKey = mutableDictSliceMap.firstKey(); } - DictNode root = dictSliceMap.get(sliceKey); + DictNode root = mutableDictSliceMap.get(sliceKey); addValueR(root, value, 0); if (root.childrenCount > MAX_ENTRY_IN_SLICE * MAX_ENTRY_OVERHEAD_FACTOR) { - dictSliceMap.remove(sliceKey); + mutableDictSliceMap.remove(sliceKey); DictNode newRoot = splitNodeTree(root); DictNode.mergeSingleByteNode(root, 1); DictNode.mergeSingleByteNode(newRoot, 0); - dictSliceMap.put(DictSliceKey.wrap(root.firstValue()), root); - dictSliceMap.put(DictSliceKey.wrap(newRoot.firstValue()), newRoot); + mutableDictSliceMap.put(DictSliceKey.wrap(root.firstValue()), root); + mutableDictSliceMap.put(DictSliceKey.wrap(newRoot.firstValue()), newRoot); } } @@ -956,18 +947,11 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { } public AppendTrieDictionary<T> build(int baseId) throws IOException { - ByteArrayOutputStream buf = new ByteArrayOutputStream(); - DataOutputStream out = new DataOutputStream(buf); - ((Writable) dictSliceMap).write(out); - byte[] dictMapBytes = buf.toByteArray(); - buf.close(); - out.close(); - if (dict == null) { dict = new AppendTrieDictionary<T>(); } - dict.update(baseDir, baseId, maxId, maxValueLength, nValues, bytesConverter, dictMapBytes); - dict.flushIndex(); + dict.flushIndex((CachedTreeMap) mutableDictSliceMap); + dict.update(baseDir, baseId, maxId, maxValueLength, nValues, bytesConverter, (CachedTreeMap)mutableDictSliceMap); return dict; } @@ -1047,24 +1031,25 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { throw new UnsupportedOperationException("AppendTrieDictionary can't retrive value from id"); } - public void flushIndex() throws IOException { - Path filePath = new Path(baseDir + "/.index"); + public void flushIndex(CachedTreeMap dictSliceMap) throws IOException { + Path filePath = new Path(dictSliceMap.getCurrentDir() + "/.index"); Configuration conf = new Configuration(); - try (FSDataOutputStream indexOut = (FileSystem.get(filePath.toUri(), conf)).create(filePath, true, 8 * 1024 * 1024, (short) 2, 8 * 1024 * 1024 * 8)) { + try (FSDataOutputStream indexOut = (FileSystem.get(filePath.toUri(), conf)).create(filePath, true, 8 * 1024 * 1024, (short) 5, 8 * 1024 * 1024 * 8)) { indexOut.writeInt(baseId); indexOut.writeInt(maxId); indexOut.writeInt(maxValueLength); indexOut.writeInt(nValues); indexOut.writeUTF(bytesConverter.getClass().getName()); - ((Writable) dictSliceMap).write(indexOut); + dictSliceMap.write(indexOut); } + dictSliceMap.commit(false); } @Override public AppendTrieDictionary copyToAnotherMeta(KylinConfig srcConfig, KylinConfig dstConfig) throws IOException { Configuration conf = new Configuration(); AppendTrieDictionary newDict = new AppendTrieDictionary(); - newDict.update(baseDir.replaceFirst(srcConfig.getHdfsWorkingDirectory(), dstConfig.getHdfsWorkingDirectory()), baseId, maxId, maxValueLength, nValues, bytesConverter, writeDictMap()); + newDict.update(baseDir.replaceFirst(srcConfig.getHdfsWorkingDirectory(), dstConfig.getHdfsWorkingDirectory()), baseId, maxId, maxValueLength, nValues, bytesConverter, (CachedTreeMap)dictSliceMap); logger.info("Copy AppendDict from {} to {}", this.baseDir, newDict.baseDir); Path srcPath = new Path(this.baseDir); Path dstPath = new Path(newDict.baseDir); @@ -1081,7 +1066,6 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { @Override public void write(DataOutput out) throws IOException { out.writeUTF(baseDir); - flushIndex(); } @Override @@ -1103,7 +1087,10 @@ public class AppendTrieDictionary<T> extends Dictionary<T> { throw new IOException(e); } } - update(baseDir, baseId, maxId, maxValueLength, nValues, converter, input); + CachedTreeMap dictMap = CachedTreeMap.CachedTreeMapBuilder.newBuilder() + .baseDir(baseDir).persistent(true).immutable(true).keyClazz(DictSliceKey.class).valueClazz(DictSlice.class).build(); + dictMap.readFields(input); + update(baseDir, baseId, maxId, maxValueLength, nValues, converter, dictMap); } } http://git-wip-us.apache.org/repos/asf/kylin/blob/30fb1e06/core-dictionary/src/main/java/org/apache/kylin/dict/CachedTreeMap.java ---------------------------------------------------------------------- diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/CachedTreeMap.java b/core-dictionary/src/main/java/org/apache/kylin/dict/CachedTreeMap.java index ec29bb5..1ea3c1c 100644 --- a/core-dictionary/src/main/java/org/apache/kylin/dict/CachedTreeMap.java +++ b/core-dictionary/src/main/java/org/apache/kylin/dict/CachedTreeMap.java @@ -32,6 +32,7 @@ import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FSDataInputStream; import org.apache.hadoop.fs.FSDataOutputStream; import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.FileUtil; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.Writable; import org.apache.hadoop.io.WritableComparable; @@ -58,6 +59,8 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext private final TreeSet<String> fileList; private final Configuration conf; private final String baseDir; + private final String tmpDir; + private final FileSystem fs; private final boolean persistent; private final boolean immutable; private long writeValueTime = 0; @@ -110,7 +113,7 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext return this; } - public CachedTreeMap build() { + public CachedTreeMap build() throws IOException { if (baseDir == null) { throw new RuntimeException("CachedTreeMap need a baseDir to cache data"); } @@ -122,13 +125,19 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext } } - private CachedTreeMap(int maxCount, Class<K> keyClazz, Class<V> valueClazz, String baseDir, boolean persistent, boolean immutable) { + private CachedTreeMap(int maxCount, Class<K> keyClazz, Class<V> valueClazz, String baseDir, boolean persistent, boolean immutable) throws IOException { super(); this.keyClazz = keyClazz; this.valueClazz = valueClazz; this.fileList = new TreeSet<>(); this.conf = new Configuration(); - this.baseDir = baseDir; + if (baseDir.endsWith("/")) { + this.baseDir = baseDir.substring(0, baseDir.length()-1); + } else { + this.baseDir = baseDir; + } + this.tmpDir = this.baseDir + ".tmp"; + this.fs = FileSystem.get(new Path(baseDir).toUri(), conf); this.persistent = persistent; this.immutable = immutable; CacheBuilder builder = CacheBuilder.newBuilder().removalListener(new RemovalListener<K, V>() { @@ -140,17 +149,27 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext writeValue(notification.getKey(), notification.getValue()); break; case EXPLICIT: - // skip delete files to recover from error during dict appending - // deleteValue(notification.getKey()); + deleteValue(notification.getKey()); break; default: throw new RuntimeException("unexpected evict reason " + notification.getCause()); } } - }).maximumSize(maxCount); - // For immutable values, use soft reference to free memory when gc, and just load again when need it + }); + // For immutable values, load all values as much as possible, and evict by soft reference to free memory when gc if (this.immutable) { builder.softValues(); + } else { + builder.maximumSize(maxCount); + // For mutable map, copy all data into tmp and modify on tmp data, avoiding suddenly server crash made data corrupt + if (fs.exists(new Path(tmpDir))) { + fs.delete(new Path(tmpDir), true); + } + if (fs.exists(new Path(this.baseDir))) { + FileUtil.copy(fs, new Path(this.baseDir), fs, new Path(tmpDir), false, true, conf); + } else { + fs.mkdirs(new Path(this.baseDir)); + } } this.valueCache = builder.build(new CacheLoader<K, V>() { @Override @@ -163,10 +182,47 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext } private String generateFileName(K key) { - String file = baseDir + "/cached_" + key.toString(); + String file = (immutable ? baseDir : tmpDir) + "/cached_" + key.toString(); return file; } + public String getCurrentDir() { + return immutable ? baseDir : tmpDir; + } + + public void commit(boolean stillMutable) throws IOException { + assert !immutable : "Only support commit method with immutable false"; + + Path basePath = new Path(baseDir); + Path backupPath = new Path(baseDir+".bak"); + Path tmpPath = new Path(tmpDir); + try { + fs.rename(basePath, backupPath); + } catch (IOException e) { + logger.info("CachedTreeMap commit backup basedir failed, " + e, e); + throw e; + } + + try { + if (stillMutable) { + FileUtil.copy(fs, tmpPath, fs, basePath, false, true, conf); + } else { + fs.rename(tmpPath, basePath); + } + fs.delete(backupPath, true); + } catch (IOException e) { + fs.rename(backupPath, basePath); + logger.info("CachedTreeMap commit move/copy tmpdir failed, " + e, e); + throw e; + } + } + + public void loadEntry(CachedTreeMap other) { + for (Object key : other.keySet()) { + super.put((K)key, null); + } + } + private void writeValue(K key, V value) { if (immutable) { return; @@ -174,10 +230,10 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext long t0 = System.currentTimeMillis(); String fileName = generateFileName(key); Path filePath = new Path(fileName); - try (FSDataOutputStream out = (FileSystem.get(filePath.toUri(), conf)).create(filePath, true, BUFFER_SIZE, (short) 2, BUFFER_SIZE * 8)) { + try (FSDataOutputStream out = fs.create(filePath, true, BUFFER_SIZE, (short) 5, BUFFER_SIZE * 8)) { value.write(out); if (!persistent) { - FileSystem.get(filePath.toUri(), conf).deleteOnExit(filePath); + fs.deleteOnExit(filePath); } } catch (Exception e) { logger.error(String.format("write value into %s exception: %s", fileName, e), e); @@ -192,7 +248,7 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext long t0 = System.currentTimeMillis(); String fileName = generateFileName(key); Path filePath = new Path(fileName); - try (FSDataInputStream input = (FileSystem.get(filePath.toUri(), conf)).open(filePath, BUFFER_SIZE)) { + try (FSDataInputStream input = fs.open(filePath, BUFFER_SIZE)) { V value = valueClazz.newInstance(); value.readFields(input); return value; @@ -211,7 +267,6 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext String fileName = generateFileName(key); Path filePath = new Path(fileName); try { - FileSystem fs = FileSystem.get(filePath.toUri(), conf); if (fs.exists(filePath)) { fs.delete(filePath, true); } @@ -224,6 +279,7 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext @Override public V put(K key, V value) { + assert !immutable : "Only support put method with immutable false"; super.put(key, null); valueCache.put(key, value); return null; @@ -245,6 +301,7 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext @Override public V remove(Object key) { + assert !immutable : "Only support remove method with immutable false"; super.remove(key); valueCache.invalidate(key); return null; @@ -300,6 +357,7 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext @Override public void remove() { + assert !immutable : "Only support remove method with immutable false"; keyIterator.remove(); valueCache.invalidate(currentKey); } @@ -344,7 +402,6 @@ public class CachedTreeMap<K extends WritableComparable, V extends Writable> ext for (String file : fileList) { try { Path filePath = new Path(file); - FileSystem fs = FileSystem.get(filePath.toUri(), conf); fs.delete(filePath, true); } catch (Throwable t) { //do nothing? http://git-wip-us.apache.org/repos/asf/kylin/blob/30fb1e06/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java ---------------------------------------------------------------------- diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java index 0ea5ebe..b81a439 100644 --- a/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java +++ b/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java @@ -56,7 +56,7 @@ public class AppendTrieDictionaryTest { KylinConfig config = KylinConfig.getInstanceFromEnv(); config.setAppendDictEntrySize(50000); config.setAppendDictCacheSize(3); - config.setProperty("kylin.hdfs.working.dir", "/tmp"); + config.setProperty("kylin.hdfs.working.dir", "/tmp/kylin_append_dict"); } @AfterClass @@ -122,7 +122,7 @@ public class AppendTrieDictionaryTest { @Test public void testHugeKeySet() throws IOException { BytesConverter converter = new StringBytesConverter(); - AppendTrieDictionary.Builder<String> b = AppendTrieDictionary.Builder.create("/tmp"); + AppendTrieDictionary.Builder<String> b = AppendTrieDictionary.Builder.create("/tmp/kylin_append_dict"); AppendTrieDictionary<String> dict = null; InputStream is = new FileInputStream("src/test/resources/dict/huge_key"); @@ -152,7 +152,7 @@ public class AppendTrieDictionaryTest { } BytesConverter converter = new StringBytesConverter(); - AppendTrieDictionary.Builder<String> b = AppendTrieDictionary.Builder.create("/tmp"); + AppendTrieDictionary.Builder<String> b = AppendTrieDictionary.Builder.create("/tmp/kylin_append_dict"); AppendTrieDictionary<String> dict = null; TreeMap<Integer, String> checkMap = new TreeMap<>(); int firstAppend = rnd.nextInt(strList.size() / 2); http://git-wip-us.apache.org/repos/asf/kylin/blob/30fb1e06/core-dictionary/src/test/java/org/apache/kylin/dict/CachedTreeMapTest.java ---------------------------------------------------------------------- diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/CachedTreeMapTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/CachedTreeMapTest.java new file mode 100644 index 0000000..d2af621 --- /dev/null +++ b/core-dictionary/src/test/java/org/apache/kylin/dict/CachedTreeMapTest.java @@ -0,0 +1,265 @@ +package org.apache.kylin.dict; + +import org.apache.hadoop.io.Writable; +import org.apache.hadoop.io.WritableComparable; +import org.junit.After; +import org.junit.Before; +import org.junit.Test; + +import java.io.*; + +import static org.junit.Assert.*; + +/** + * Created by sunyerui on 16/7/12. + */ +public class CachedTreeMapTest { + + public static class Key implements WritableComparable { + int keyInt; + + public static Key of(int keyInt) { + Key newKey = new Key(); + newKey.keyInt = keyInt; + return newKey; + } + + @Override + public int compareTo(Object o) { + return keyInt - ((Key)o).keyInt; + } + + @Override + public void write(DataOutput out) throws IOException { + out.writeInt(keyInt); + } + + @Override + public void readFields(DataInput in) throws IOException { + keyInt = in.readInt(); + } + + @Override + public String toString() { + return String.valueOf(keyInt); + } + } + + public static boolean VALUE_WRITE_ERROR_TOGGLE = false; + public static class Value implements Writable { + String valueStr; + + public static Value of(String valueStr) { + Value newValue = new Value(); + newValue.valueStr = valueStr; + return newValue; + } + + @Override + public void write(DataOutput out) throws IOException { + if (VALUE_WRITE_ERROR_TOGGLE) { + out.write(new byte[0]); + return; + } + out.writeUTF(valueStr); + } + + @Override + public void readFields(DataInput in) throws IOException { + valueStr = in.readUTF(); + } + } + + public static class CachedFileFilter implements FileFilter { + @Override + public boolean accept(File pathname) { + return pathname.getName().startsWith("cached_"); + } + } + + public static final String baseDir = "/tmp/kylin_cachedtreemap_test/"; + public static final String backupDir = "/tmp/kylin_cachedtreemap_test.bak/"; + public static final String tmpDir = "/tmp/kylin_cachedtreemap_test.tmp/"; + + @After + public void afterTest() { + File dir = new File(baseDir); + if (dir.exists()) { + for (File f : dir.listFiles()) { + f.delete(); + } + dir.delete(); + } + + dir = new File(tmpDir); + if (dir.exists()) { + for (File f : dir.listFiles()) { + f.delete(); + } + dir.delete(); + } + + dir = new File(backupDir); + if (dir.exists()) { + for (File f : dir.listFiles()) { + f.delete(); + } + dir.delete(); + } + + VALUE_WRITE_ERROR_TOGGLE = false; + } + + @Test + public void testCachedTreeMap() throws IOException { + CachedTreeMap map = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(false).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map.put(Key.of(1), Value.of("a")); + map.put(Key.of(2), Value.of("b")); + map.put(Key.of(3), Value.of("c")); + map.put(Key.of(4), Value.of("d")); + map.put(Key.of(5), Value.of("e")); + + File dir = new File(tmpDir); + assertEquals(3, dir.listFiles(new CachedFileFilter()).length); + + DataOutputStream out = new DataOutputStream(new FileOutputStream(tmpDir+"/.index")); + map.write(out); + out.flush(); + out.close(); + map.commit(false); + + dir = new File(baseDir); + assertEquals(5, dir.listFiles(new CachedFileFilter()).length); + + DataInputStream in = new DataInputStream(new FileInputStream(baseDir+".index")); + CachedTreeMap map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(5, map2.size()); + assertEquals("b", ((Value)map2.get(Key.of(2))).valueStr); + + try { + map2.put(Key.of(6), Value.of("f")); + fail("Should be error when put value into immutable map"); + } catch (AssertionError error) { + } + + assertFalse(new File(tmpDir).exists()); + assertFalse(new File(backupDir).exists()); + } + + @Test + public void testWriteFailed() throws IOException { + // normal case + CachedTreeMap map = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(false).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map.put(Key.of(1), Value.of("a")); + map.put(Key.of(2), Value.of("b")); + map.put(Key.of(3), Value.of("c")); + map.remove(Key.of(3)); + map.put(Key.of(4), Value.of("d")); + + DataOutputStream out = new DataOutputStream(new FileOutputStream(tmpDir+".index")); + map.write(out); + out.flush(); + out.close(); + map.commit(false); + + DataInputStream in = new DataInputStream(new FileInputStream(baseDir+".index")); + CachedTreeMap map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(3, map2.size()); + assertEquals("a", ((Value)map2.get(Key.of(1))).valueStr); + + // suppose write value failed and didn't commit data + map = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(false).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + VALUE_WRITE_ERROR_TOGGLE = true; + map.put(Key.of(1), Value.of("aa")); + map.put(Key.of(2), Value.of("bb")); + VALUE_WRITE_ERROR_TOGGLE = false; + map.put(Key.of(3), Value.of("cc")); + map.put(Key.of(4), Value.of("dd")); + out = new DataOutputStream(new FileOutputStream(tmpDir+".index")); + map.write(out); + out.flush(); + out.close(); + // suppose write value failed and didn't commit data + //map.commit(false); + + // read map data should not be modified + in = new DataInputStream(new FileInputStream(baseDir+".index")); + map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(3, map2.size()); + assertEquals("a", ((Value)map2.get(Key.of(1))).valueStr); + + assertTrue(new File(tmpDir).exists()); + assertFalse(new File(backupDir).exists()); + } + + @Test + public void testCommit() throws IOException { + CachedTreeMap map = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(false).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map.put(Key.of(1), Value.of("a")); + map.put(Key.of(2), Value.of("b")); + map.put(Key.of(3), Value.of("c")); + map.put(Key.of(4), Value.of("d")); + + DataOutputStream out = new DataOutputStream(new FileOutputStream(tmpDir+".index")); + map.write(out); + out.flush(); + out.close(); + map.commit(true); + + assertTrue(new File(tmpDir).exists()); + assertFalse(new File(backupDir).exists()); + + DataInputStream in = new DataInputStream(new FileInputStream(baseDir+".index")); + CachedTreeMap map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(4, map2.size()); + assertEquals("a", ((Value)map2.get(Key.of(1))).valueStr); + + // continue modify map, but not commit + map.put(Key.of(1), Value.of("aa")); + map.put(Key.of(2), Value.of("bb")); + map.put(Key.of(3), Value.of("cc")); + map.put(Key.of(5), Value.of("e")); + map.put(Key.of(6), Value.of("f")); + out = new DataOutputStream(new FileOutputStream(tmpDir+".index")); + map.write(out); + out.flush(); + out.close(); + + assertTrue(new File(tmpDir).exists()); + assertEquals(6, new File(tmpDir).listFiles(new CachedFileFilter()).length); + assertEquals(4, new File(baseDir).listFiles(new CachedFileFilter()).length); + + in = new DataInputStream(new FileInputStream(baseDir+".index")); + map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(4, map2.size()); + assertEquals("a", ((Value)map2.get(Key.of(1))).valueStr); + + // commit data + map.commit(false); + assertFalse(new File(tmpDir).exists()); + assertEquals(6, new File(baseDir).listFiles(new CachedFileFilter()).length); + + in = new DataInputStream(new FileInputStream(baseDir+".index")); + map2 = CachedTreeMap.CachedTreeMapBuilder.newBuilder().baseDir("file://"+baseDir) + .persistent(true).immutable(true).maxSize(2).keyClazz(Key.class).valueClazz(Value.class).build(); + map2.readFields(in); + assertEquals(6, map2.size()); + assertEquals("aa", ((Value)map2.get(Key.of(1))).valueStr); + assertEquals("f", ((Value)map2.get(Key.of(6))).valueStr); + } +} +
