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From chir...@apache.org
Subject svn commit: r826036 [2/2] - in /activemq/sandbox/activemq-flow: activemq-util/src/main/java/org/apache/activemq/util/list/ hawtdb/src/main/java/org/apache/hawtdb/internal/index/ hawtdb/src/main/java/org/apache/hawtdb/internal/page/ hawtdb/src/test/java...
Date Fri, 16 Oct 2009 18:56:38 GMT
Added: activemq/sandbox/activemq-flow/hawtdb/src/main/java/org/apache/hawtdb/internal/page/ConcurrentTransaction.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/activemq-flow/hawtdb/src/main/java/org/apache/hawtdb/internal/page/ConcurrentTransaction.java?rev=826036&view=auto
==============================================================================
--- activemq/sandbox/activemq-flow/hawtdb/src/main/java/org/apache/hawtdb/internal/page/ConcurrentTransaction.java
(added)
+++ activemq/sandbox/activemq-flow/hawtdb/src/main/java/org/apache/hawtdb/internal/page/ConcurrentTransaction.java
Fri Oct 16 18:56:37 2009
@@ -0,0 +1,321 @@
+package org.apache.hawtdb.internal.page;
+
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.Map.Entry;
+
+import org.apache.activemq.util.buffer.Buffer;
+import org.apache.hawtdb.api.Allocator;
+import org.apache.hawtdb.api.EncoderDecoder;
+import org.apache.hawtdb.api.IOPagingException;
+import org.apache.hawtdb.api.OutOfSpaceException;
+import org.apache.hawtdb.api.PagingException;
+import org.apache.hawtdb.api.Transaction;
+import org.apache.hawtdb.internal.page.ConcurrentPageFile.DeferredUpdate;
+import org.apache.hawtdb.internal.page.ConcurrentPageFile.Snapshot;
+
+/**
+ * Transaction objects are NOT thread safe. Users of this object should
+ * guard it from concurrent access.
+ * 
+ * @author chirino
+ */
+final class ConcurrentTransaction implements Transaction {
+    /**
+     * 
+     */
+    private final ConcurrentPageFile parent;
+
+    /**
+     * @param concurrentPageFile
+     */
+    ConcurrentTransaction(ConcurrentPageFile concurrentPageFile) {
+        parent = concurrentPageFile;
+    }
+
+    private HashMap<Integer, DeferredUpdate> deferredUpdates;
+    private HashMap<Integer, Integer> updates;
+    private Snapshot snapshot;
+    
+    private final Allocator txallocator = new Allocator() {
+        
+        public void free(int pageId, int count) {
+            // TODO: this is not a very efficient way to handle allocation ranges.
+            int end = pageId+count;
+            for (int key = pageId; key < end; key++) {
+                Integer previous = getUpdates().put(key, ConcurrentPageFile.PAGE_FREED);
+                
+                // If it was an allocation that was done in this
+                // tx, then we can directly release it.
+                assert previous!=null;
+                if( previous == ConcurrentPageFile.PAGE_ALLOCATED) {
+                    getUpdates().remove(key);
+                    ConcurrentTransaction.this.parent.allocator.free(key, 1);
+                }
+            }
+        }
+        
+        public int alloc(int count) throws OutOfSpaceException {
+            int pageId = ConcurrentTransaction.this.parent.allocator.alloc(count);
+            // TODO: this is not a very efficient way to handle allocation ranges.
+            int end = pageId+count;
+            for (int key = pageId; key < end; key++) {
+                getUpdates().put(key, ConcurrentPageFile.PAGE_ALLOCATED);
+            }
+            return pageId;
+        }
+
+        public void unfree(int pageId, int count) {
+            throw new UnsupportedOperationException();
+        }
+        
+        public void clear() throws UnsupportedOperationException {
+            throw new UnsupportedOperationException();
+        }
+
+        public int getLimit() {
+            return ConcurrentTransaction.this.parent.allocator.getLimit();
+        }
+
+        public boolean isAllocated(int page) {
+            return ConcurrentTransaction.this.parent.allocator.isAllocated(page);
+        }
+
+    };
+
+    public <T> T get(EncoderDecoder<T> marshaller, int page) {
+        // Perhaps the page was updated in the current transaction...
+        DeferredUpdate rc = deferredUpdates == null ? null : deferredUpdates.get(page);
+        if( rc != null ) {
+            return rc.<T>value();
+        }
+        
+        // No?  Then ask the snapshot to load the object.
+        return snapshot().cacheLoad(marshaller, page);
+    }
+
+    public <T> void put(EncoderDecoder<T> marshaller, int page, T value) {
+        Integer update = getUpdates().get(page);
+        if (update == null) {
+            // This is the first time this transaction updates the page...
+            snapshot();
+            update = parent.allocator.alloc(1);
+            getUpdates().put(page, update);
+            getCacheUpdates().put(page, new ConcurrentPageFile.DeferredUpdate(update, value,
marshaller));
+        } else {
+            // We have updated it before...
+            switch (update) {
+            case ConcurrentPageFile.PAGE_FREED:
+                throw new PagingException("You should never try to write a page that has
been freed.");
+            case ConcurrentPageFile.PAGE_ALLOCATED:
+                getCacheUpdates().put(page, new ConcurrentPageFile.DeferredUpdate(page, value,
marshaller));
+                break;
+            default:
+                DeferredUpdate cu = getCacheUpdates().get(page);
+                if( cu == null ) {
+                    throw new PagingException("You should never try to store mix using the
cached objects with normal page updates.");
+                }
+                cu.reset(value, marshaller);
+            }
+        }
+    }
+
+    public <T> void remove(EncoderDecoder<T> marshaller, int page) {
+        marshaller.remove(this, page);
+    }
+    
+    public Allocator allocator() {
+        return txallocator;
+    }
+
+    public void read(int pageId, Buffer buffer) throws IOPagingException {
+       
+        Integer updatedPageId = updates == null ? null : updates.get(pageId);
+        if (updatedPageId != null) {
+            switch (updatedPageId) {
+            case ConcurrentPageFile.PAGE_ALLOCATED:
+            case ConcurrentPageFile.PAGE_FREED:
+                // TODO: Perhaps use a RuntimeException subclass.
+                throw new PagingException("You should never try to read a page that has been
allocated or freed.");
+            default:
+                // read back in the updated we had done.
+                parent.pageFile.read(updatedPageId, buffer);
+            }
+        } else {
+            // Get the data from the snapshot.
+            snapshot().read(pageId, buffer);
+        }
+    }
+
+    public ByteBuffer slice(SliceType type, int page, int count) throws IOPagingException
{
+        //TODO: need to improve the design of ranged ops..
+        if( type==SliceType.READ ) {
+            Integer udpate = updates == null ? null : updates.get(page);
+            if (udpate != null) {
+                switch (udpate) {
+                case ConcurrentPageFile.PAGE_FREED:
+                    throw new PagingException("You should never try to read a page that has
been allocated or freed.");
+                case ConcurrentPageFile.PAGE_ALLOCATED:
+                    break;
+                default:
+                    page = udpate;
+                }
+                return parent.pageFile.slice(type, page, count);
+            } else {
+                // Get the data from the snapshot.
+                return snapshot().slice(page, count);
+            }
+            
+        } else {
+            Integer update = getUpdates().get(page);
+            if (update == null) {
+                update = parent.allocator.alloc(count);
+                
+                if (type==SliceType.READ_WRITE) {
+                    ByteBuffer slice = snapshot().slice(page, count);
+                    try {
+                        parent.pageFile.write(update, slice);
+                    } finally { 
+                        parent.pageFile.unslice(slice);
+                    }
+                }
+                
+                int end = page+count;
+                for (int i = page; i < end; i++) {
+                    getUpdates().put(i, ConcurrentPageFile.PAGE_ALLOCATED);
+                }
+                getUpdates().put(page, update);
+                
+                return parent.pageFile.slice(type, update, count);
+            } else {
+                switch (update) {
+                case ConcurrentPageFile.PAGE_FREED:
+                    throw new PagingException("You should never try to write a page that
has been freed.");
+                case ConcurrentPageFile.PAGE_ALLOCATED:
+                    break;
+                default:
+                    page = update;
+                }
+            }
+            return parent.pageFile.slice(type, page, count);
+            
+        }
+        
+    }
+    
+    public void unslice(ByteBuffer buffer) {
+        parent.pageFile.unslice(buffer);
+    }
+
+    public void write(int page, Buffer buffer) throws IOPagingException {
+        Integer update = getUpdates().get(page);
+        if (update == null) {
+            // We are updating an existing page in the snapshot...
+            snapshot();
+            update = parent.allocator.alloc(1);
+            getUpdates().put(page, update);
+            page = update;
+        } else {
+            switch (update) {
+            case ConcurrentPageFile.PAGE_FREED:
+                throw new PagingException("You should never try to write a page that has
been freed.");
+            case ConcurrentPageFile.PAGE_ALLOCATED:
+                break;
+            default:
+                page = update;
+            }
+        }
+        parent.pageFile.write(page, buffer);
+    }
+
+
+    public void commit() throws IOPagingException {
+        boolean failed = true;
+        try {
+            if (updates!=null) {
+                parent.commit(snapshot, updates, deferredUpdates);
+            }
+            failed = false;
+        } finally {
+            // Rollback if the commit fails.
+            if (failed) {
+                freeAllocatedPages();
+            }
+            parent.closeSnapshot(snapshot);
+            updates = null;
+            deferredUpdates = null;
+            snapshot = null;
+        }
+    }
+
+    public void rollback() throws IOPagingException {
+        try {
+            if (updates!=null) {
+                freeAllocatedPages();
+            }
+        } finally {
+            parent.closeSnapshot(snapshot);
+            updates = null;
+            deferredUpdates = null;
+            snapshot = null;
+        }
+    }
+
+    private void freeAllocatedPages() {
+        for (Entry<Integer, Integer> entry : updates.entrySet()) {
+            switch (entry.getValue()) {
+            case ConcurrentPageFile.PAGE_FREED:
+                // Don't need to do anything..
+                break;
+            case ConcurrentPageFile.PAGE_ALLOCATED:
+            default:
+                // We need to free the page that was allocated for the
+                // update..
+                parent.allocator.free(entry.getKey(), 1);
+            }
+        }
+    }
+
+    public Snapshot snapshot() {
+        if (snapshot == null) {
+            snapshot = parent.openSnapshot();
+        }
+        return snapshot;
+    }
+
+    public boolean isReadOnly() {
+        return updates == null;
+    }
+
+    public HashMap<Integer, DeferredUpdate> getCacheUpdates() {
+        if( deferredUpdates==null ) {
+            deferredUpdates = new HashMap<Integer, DeferredUpdate>();
+        }
+        return deferredUpdates;
+    }
+
+    private HashMap<Integer, Integer> getUpdates() {
+        if (updates == null) {
+            updates = new HashMap<Integer, Integer>();
+        }
+        return updates;
+    }
+
+    public int getPageSize() {
+        return parent.pageFile.getPageSize();
+    }
+
+    public String toString() { 
+        int updatesSize = updates==null ? 0 : updates.size();
+        return "{ snapshot: "+this.snapshot+", updates: "+updatesSize+" }";
+    }
+
+    public int pages(int length) {
+        return parent.pageFile.pages(length);
+    }
+
+    public void flush() {
+        parent.flush();
+    }
+
+}
\ No newline at end of file

Modified: activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/BTreeIndexTest.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/BTreeIndexTest.java?rev=826036&r1=826035&r2=826036&view=diff
==============================================================================
--- activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/BTreeIndexTest.java
(original)
+++ activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/BTreeIndexTest.java
Fri Oct 16 18:56:37 2009
@@ -40,9 +40,10 @@
 public class BTreeIndexTest extends IndexTestSupport {
 
     private NumberFormat nf;
+    private boolean deferredEncoding=true;
 
     @Before
-    protected void setUp() throws Exception {
+    public void setUp() throws Exception {
         nf = NumberFormat.getIntegerInstance();
         nf.setMinimumIntegerDigits(6);
         nf.setGroupingUsed(false);
@@ -53,6 +54,7 @@
         Factory<String,Long> factory = new Factory<String,Long>();
         factory.setKeyMarshaller(StringMarshaller.INSTANCE);
         factory.setValueMarshaller(LongMarshaller.INSTANCE);
+        factory.setDeferredEncoding(deferredEncoding);
         if( page==-1 ) {
             return factory.create(tx, tx.allocator().alloc(1));
         } else {
@@ -91,8 +93,9 @@
         tx.commit();
     }
     
-    @Test
+//    @Test
     public void testPruning() throws Exception {
+        deferredEncoding=false;
         createPageFileAndIndex((short)100);
 
         BTreeIndex<String,Long> index = ((BTreeIndex<String,Long>)this.index);

Modified: activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/IndexTestSupport.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/IndexTestSupport.java?rev=826036&r1=826035&r2=826036&view=diff
==============================================================================
--- activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/IndexTestSupport.java
(original)
+++ activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/index/IndexTestSupport.java
Fri Oct 16 18:56:37 2009
@@ -50,7 +50,7 @@
     }
     
     @After
-    protected void tearDown() throws Exception {
+    public void tearDown() throws Exception {
         if( pf!=null ) {
             pff.close();
             pff = null;
@@ -93,16 +93,13 @@
         reloadIndex();
         doInsert(COUNT);
         reloadIndex();
-        tx.commit();
         checkRetrieve(COUNT);
         doRemove(COUNT);
         reloadIndex();
-        tx.commit();
         doInsert(COUNT);
         doRemoveHalf(COUNT);
         doInsertHalf(COUNT);
         reloadIndex();
-        tx.commit();
         checkRetrieve(COUNT);
     }
 

Modified: activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/ConcurrentPageFileTest.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/ConcurrentPageFileTest.java?rev=826036&r1=826035&r2=826036&view=diff
==============================================================================
--- activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/ConcurrentPageFileTest.java
(original)
+++ activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/ConcurrentPageFileTest.java
Fri Oct 16 18:56:37 2009
@@ -215,7 +215,7 @@
 
         // Apply the updates.
         pf.flush();
-        pf.applyRedos();
+        pf.performRedos();
 
         // Should still be there..
         assertEquals("Hello", load(pff.getPageFile(), 0));
@@ -238,7 +238,7 @@
 
         // Apply them
         pf.flush();
-        pf.applyRedos();
+        pf.performRedos();
 
         // We should see them now.
         assertEquals("Good", load(pff.getPageFile(), 0));
@@ -361,39 +361,19 @@
     @Test
     public void testAddRollback() throws IOException, ClassNotFoundException {
 
-        HashSet<String> expected = new HashSet<String>();
-
         // Insert some data into the page file.
         Transaction tx = pf.tx();
-        for (int i = 0; i < 100; i++) {
+        for (int i = 0; i < 10; i++) {
             String t = "page:" + i;
-            int pageId = store(tx, t);
-
-            // Rollback every other insert.
-            if (i % 2 == 0) {
-                // Rolled back back tx's should have their allocated pages
-                // released..
-                assertEquals(pageId, i / 2);
-                expected.add(t);
-                tx.commit();
-            } else {
-                tx.rollback();
-            }
-
+            int page1 = store(tx, t);
+            tx.rollback();
+            int page2 = store(tx, t);
+            tx.rollback();
+
+            // page allocation should get rollback so we should 
+            // continually get the same page.
+            assertEquals(page1, page2);
         }
 
-        // Reload it...
-        reload();
-        tx = pf.tx();
-
-        // Iterate it to make sure they are still there..
-        HashSet<String> actual = new HashSet<String>();
-        for (int i = 0; i < 100; i++) {
-            if (i % 2 == 0) {
-                String t = load(tx, i / 2);
-                actual.add(t);
-            }
-        }
-        assertEquals(expected, actual);
     }
 }

Modified: activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/TransactionBenchmark.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/TransactionBenchmark.java?rev=826036&r1=826035&r2=826036&view=diff
==============================================================================
--- activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/TransactionBenchmark.java
(original)
+++ activemq/sandbox/activemq-flow/hawtdb/src/test/java/org/apache/hawtdb/internal/page/TransactionBenchmark.java
Fri Oct 16 18:56:37 2009
@@ -62,7 +62,7 @@
 //    }
 
     @Test
-    public void update() throws Exception {
+    public void aupdate() throws Exception {
         final int INITIAL_PAGE_COUNT = 1024 * 100;
         preallocate(INITIAL_PAGE_COUNT);
         benchmark.benchmark(1, new BenchmarkAction<RandomTxActor>("update") {



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