MVStore: simpler API

h2/src/main/org/h2/mvstore/MVMap.java

@@ -847,7 +847,7 @@ public class MVMap<K, V> extends AbstractMap<K, V>
      * Forget those old versions that are no longer needed.
      */
     void removeUnusedOldVersions() {
-        long oldest = store.getRetainOrStoreVersion();
+        long oldest = store.getOldestVersionToKeep();
         if (oldest == -1) {
             return;
         }

h2/src/main/org/h2/mvstore/db/MVSecondaryIndex.java

@@ -96,7 +96,7 @@ public class MVSecondaryIndex extends BaseIndex {
             }
         }
         try {
-            map.put(array, ValueLong.get(0));
+            map.put(array, ValueNull.INSTANCE);
         } catch (IllegalStateException e) {
             throw DbException.get(ErrorCode.CONCURRENT_UPDATE_1, table.getName());
         }

h2/src/main/org/h2/mvstore/db/MVSpatialIndex.java

@@ -58,6 +58,7 @@ public class MVSpatialIndex extends BaseIndex implements SpatialIndex {
     /**
      * Constructor.
      *
+     * @param db the database
      * @param table the table instance
      * @param id the index id
      * @param indexName the index name

h2/src/main/org/h2/mvstore/db/MVTableEngine.java

@@ -168,13 +168,13 @@ public class MVTableEngine implements TableEngine {
         /**
          * Store all pending changes.
          */
-        public void store() {
+        public void flush() {
             FileStore s = store.getFileStore();
             if (s == null || s.isReadOnly()) {
                 return;
             }
             if (!store.compact(50)) {
-                store.store();
+                store.commit();
             }
         }
 
@@ -213,9 +213,7 @@ public class MVTableEngine implements TableEngine {
             Transaction t = session.getTransaction();
             t.setName(transactionName);
             t.prepare();
-            if (store.getFileStore() != null) {
-                store.store();
-            }
+            store.commit();
         }
 
         public ArrayList<InDoubtTransaction> getInDoubtTransactions() {
@@ -245,7 +243,7 @@ public class MVTableEngine implements TableEngine {
          * Force the changes to disk.
          */
         public void sync() {
-            store();
+            flush();
             store.sync();
         }
 
@@ -316,9 +314,7 @@ public class MVTableEngine implements TableEngine {
             } else {
                 transaction.rollback();
             }
-            if (store.getFileStore() != null) {
-                store.store();
-            }
+            store.commit();
             this.state = state;
         }
 

h2/src/main/org/h2/mvstore/db/TransactionStore.java

@@ -170,9 +170,7 @@ public class TransactionStore {
     public synchronized void close() {
         // to avoid losing transaction ids
         settings.put(LAST_TRANSACTION_ID, "" + lastTransactionId);
-        if (store.getFileStore() != null) {
-            store.store();
-        }
+        store.commit();
     }
 
     /**
@@ -192,9 +190,7 @@ public class TransactionStore {
 
     private void commitIfNeeded() {
         if (store.getUnsavedPageCount() > MAX_UNSAVED_PAGES) {
-            if (store.getFileStore() != null) {
-                store.store();
-            }
+            store.commit();
         }
     }
 
@@ -354,10 +350,8 @@ public class TransactionStore {
         if (t.getId() == firstOpenTransaction) {
             firstOpenTransaction = -1;
         }
-        if (store.getWriteDelay() == 0) {
-            if (store.getFileStore() != null) {
-                store.store();
-            }
+        if (store.getAutoCommitDelay() == 0) {
+            store.commit();
             return;
         }
         // to avoid having to store the transaction log,
@@ -365,10 +359,10 @@ public class TransactionStore {
         // and if there have been many changes, store them now
         if (undoLog.isEmpty()) {
             int unsaved = store.getUnsavedPageCount();
-            int max = store.getUnsavedPageCountMax();
+            int max = store.getAutoCommitPageCount();
             // save at 3/4 capacity
             if (unsaved * 4 > max * 3) {
-                store.store();
+                store.commit();
             }
         }
     }
@@ -659,6 +653,14 @@ public class TransactionStore {
             return new TransactionMap<K, V>(this, map, mapId);
         }
 
+        /**
+         * Open the transactional version of the given map.
+         *
+         * @param <K> the key type
+         * @param <V> the value type
+         * @param map the base map
+         * @return the transactional map
+         */
         public <K, V> TransactionMap<K, V> openMap(MVMap<K, VersionedValue> map) {
             checkNotClosed();
             int mapId = map.getId();
@@ -729,6 +731,8 @@ public class TransactionStore {
 
         /**
          * Remove the map.
+         *
+         * @param map the map
          */
         public <K, V> void removeMap(TransactionMap<K, V> map) {
             store.store.removeMap(map.map);

h2/src/test/org/h2/test/store/TestConcurrent.java

@@ -62,20 +62,19 @@ public class TestConcurrent extends TestMVStore {
         for (int test = 0; test < 10; test++) {
             FileUtils.delete(fileName);
             final MVStore s1 = new MVStore.Builder().
-                    fileName(fileName).writeDelay(-1).open();
+                    fileName(fileName).autoCommitDisabled().open();
             s1.setRetentionTime(0);
             final int count = 200;
             for (int i = 0; i < count; i++) {
                 MVMap<Integer, Integer> m = s1.openMap("d" + i);
                 m.put(1, 1);
                 if (i % 2 == 0) {
-                    s1.store();
+                    s1.commit();
                 }
             }
-            s1.store();
             s1.close();
             final MVStore s = new MVStore.Builder().
-                    fileName(fileName).writeDelay(-1).open();
+                    fileName(fileName).autoCommitDisabled().open();
             s.setRetentionTime(0);
             final ArrayList<MVMap<Integer, Integer>> list = New.arrayList();
             for (int i = 0; i < count; i++) {
@@ -113,7 +112,7 @@ public class TestConcurrent extends TestMVStore {
                 }
             }
             task.get();
-            s.store();
+            s.commit();
 
             MVMap<String, String> meta = s.getMetaMap();
             int chunkCount = 0;
@@ -142,7 +141,7 @@ public class TestConcurrent extends TestMVStore {
             public void call() throws Exception {
                 while (!stop) {
                     counter.incrementAndGet();
-                    s.store();
+                    s.commit();
                 }
             }
         };
@@ -172,7 +171,7 @@ public class TestConcurrent extends TestMVStore {
                 public void call() throws Exception {
                     while (!stop) {
                         s.setStoreVersion(counter.incrementAndGet());
-                        s.store();
+                        s.commit();
                     }
                 }
             };
@@ -270,9 +269,9 @@ public class TestConcurrent extends TestMVStore {
                     for (int i = 0; i < 10; i++) {
                         map.put(i, new byte[100 * r.nextInt(100)]);
                     }
-                    s.store();
+                    s.commit();
                     map.clear();
-                    s.store();
+                    s.commit();
                     long len = s.getFileStore().size();
                     if (len > 1024 * 1024) {
                         // slow down writing a lot
@@ -322,6 +321,7 @@ public class TestConcurrent extends TestMVStore {
 
     private void testConcurrentIterate() {
         MVStore s = new MVStore.Builder().pageSplitSize(3).open();
+        s.setVersionsToKeep(100);
         final MVMap<Integer, Integer> map = s.openMap("test");
         final int len = 10;
         final Random r = new Random();
@@ -343,7 +343,6 @@ public class TestConcurrent extends TestMVStore {
             Iterator<Integer> it = map.keyIterator(r.nextInt(len));
             long old = s.getCurrentVersion();
             s.commit();
-            s.setRetainVersion(old - 100);
             while (map.getVersion() == old) {
                 Thread.yield();
             }

h2/src/test/org/h2/test/store/TestKillProcessWhileWriting.java

@@ -84,9 +84,8 @@ public class TestKillProcessWhileWriting extends TestBase {
         s = new MVStore.Builder().
                 fileName(fileName).
                 pageSplitSize(50).
-                writeDelay(0).
+                autoCommitDisabled().
                 open();
-        s.setWriteDelay(0);
         m = s.openMap("data");
         Random r = new Random(seed);
         int op = 0;
@@ -107,7 +106,7 @@ public class TestKillProcessWhileWriting extends TestBase {
                     m.remove(k);
                     break;
                 case 6:
-                    s.store();
+                    s.commit();
                     break;
                 case 7:
                     s.compact(80);
@@ -120,12 +119,12 @@ public class TestKillProcessWhileWriting extends TestBase {
                     s = new MVStore.Builder().
                             fileName(fileName).
                             pageSplitSize(50).
-                            writeDelay(0).open();
+                            autoCommitDisabled().
+                            open();
                     m = s.openMap("data");
                     break;
                 }
             }
-            s.store();
             s.close();
             return 0;
         } catch (Exception e) {

h2/src/test/org/h2/test/store/TestMVRTree.java

@@ -119,7 +119,7 @@ public class TestMVRTree extends TestMVStore {
             SpatialKey k = new SpatialKey(i, x - p, x + p, y - p, y + p);
             r.add(k, "" + i);
             if (i > 0 && (i % len / 10) == 0) {
-                s.store();
+                s.commit();
             }
             if (i > 0 && (i % 10000) == 0) {
                 render(r, getBaseDir() + "/test.png");
@@ -127,7 +127,6 @@ public class TestMVRTree extends TestMVStore {
         }
         // System.out.println(prof.getTop(5));
         // System.out.println("add: " + (System.currentTimeMillis() - t));
-        s.store();
         s.close();
         s = openStore(fileName);
         r = s.openMap("data",

h2/src/test/org/h2/test/store/TestRandomMapOps.java

@@ -92,7 +92,7 @@ public class TestRandomMapOps extends TestBase {
         for (; op < size; op++) {
             int k = r.nextInt(100);
             byte[] v = new byte[r.nextInt(10) * 10];
-            int type = r.nextInt(13);
+            int type = r.nextInt(12);
             switch (type) {
             case 0:
             case 1:
@@ -109,23 +109,19 @@ public class TestRandomMapOps extends TestBase {
                 map.remove(k);
                 break;
             case 6:
-                log(op, k, v, "s.store()");
-                s.store();
-                break;
-            case 7:
                 log(op, k, v, "s.compact(90)");
                 s.compact(90);
                 break;
-            case 8:
+            case 7:
                 log(op, k, v, "m.clear()");
                 m.clear();
                 map.clear();
                 break;
-            case 9:
+            case 8:
                 log(op, k, v, "s.commit()");
                 s.commit();
                 break;
-            case 10:
+            case 9:
                 log(op, k, v, "s.commit()");
                 s.commit();
                 log(op, k, v, "s.close()");
@@ -135,13 +131,13 @@ public class TestRandomMapOps extends TestBase {
                 log(op, k, v, "m = s.openMap(\"data\")");
                 m = s.openMap("data");
                 break;
-            case 11:
+            case 10:
                 log(op, k, v, "s.commit()");
                 s.commit();
                 log(op, k, v, "s.compactMoveChunks()");
                 s.compactMoveChunks();
                 break;
-            case 12:
+            case 11:
                 log(op, k, v, "m.getKeyIndex({0})");
                 ArrayList<Integer> keyList = new ArrayList<Integer>(map.keySet());
                 int index = Collections.binarySearch(keyList, k, null);
@@ -165,13 +161,12 @@ public class TestRandomMapOps extends TestBase {
                 assertEquals(map.lastKey(), m.lastKey());
             }
         }
-        s.store();
         s.close();
     }
 
     private static MVStore openStore(String fileName) {
         MVStore s = new MVStore.Builder().fileName(fileName).
-                pageSplitSize(50).writeDelay(0).open();
+                pageSplitSize(50).autoCommitDisabled().open();
         s.setRetentionTime(0);
         return s;
     }

h2/src/test/org/h2/test/store/TestStreamStore.java

@@ -65,7 +65,7 @@ public class TestStreamStore extends TestBase {
         for (int i = 0; i < 100; i++) {
             streamStore.put(new RandomStream(size, i));
         }
-        s.store();
+        s.commit();
         MVMap<Long, byte[]> map = s.openMap("data");
         assertTrue("size: " + map.size(), map.sizeAsLong() >= 100);
         s.close();
@@ -77,7 +77,7 @@ public class TestStreamStore extends TestBase {
         for (int i = 0; i < 100; i++) {
             streamStore.put(new RandomStream(size, -i));
         }
-        s.store();
+        s.commit();
         long readCount = s.getFileStore().getReadCount();
         // the read count should be low because new blocks
         // are appended at the end (not between existing blocks)
@@ -92,7 +92,7 @@ public class TestStreamStore extends TestBase {
         return new StreamStore(map) {
             @Override
             protected void onStore(int len) {
-                if (s.getUnsavedPageCount() > s.getUnsavedPageCountMax() / 2) {
+                if (s.getUnsavedPageCount() > s.getAutoCommitPageCount() / 2) {
                     s.commit();
                 }
             }
@@ -111,12 +111,11 @@ public class TestStreamStore extends TestBase {
             @Override
             protected void onStore(int len) {
                 count.incrementAndGet();
-                s.store();
+                s.commit();
             }
         };
         long size = 1 * 1024 * 1024;
         streamStore.put(new RandomStream(size, 0));
-        s.store();
         s.close();
         assertEquals(4, count.get());
     }

h2/src/test/org/h2/test/store/TestTransactionStore.java

@@ -86,7 +86,7 @@ public class TestTransactionStore extends TestBase {
                     for (int i = 0; !stop; i++) {
                         state.set(i);
                         other.put(i, value);
-                        store.store();
+                        store.commit();
                     }
                 }
             };