Sharded implementation of DOMDataTreeService

[controller.git] / opendaylight / md-sal / sal-dom-broker / src / main / java / org / opendaylight / controller / md / sal / dom / broker / impl / ShardedDOMDataWriteTransaction.java

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/ShardedDOMDataWriteTransaction.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/ShardedDOMDataWriteTransaction.java
new file mode 100644 (file)
index 0000000..33f15e3
--- /dev/null
+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/ShardedDOMDataWriteTransaction.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.md.sal.dom.broker.impl;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicLong;
+import javax.annotation.concurrent.GuardedBy;
+import javax.annotation.concurrent.NotThreadSafe;
+import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
+import org.opendaylight.controller.md.sal.common.impl.service.AbstractDataTransaction;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeIdentifier;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
+import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@NotThreadSafe
+final class ShardedDOMDataWriteTransaction implements DOMDataWriteTransaction {
+    private static final Logger LOG = LoggerFactory.getLogger(ShardedDOMDataWriteTransaction.class);
+    private static final AtomicLong COUNTER = new AtomicLong();
+    private final Map<DOMDataTreeIdentifier, DOMStoreWriteTransaction> idToTransaction;
+    private final ShardedDOMDataTreeProducer producer;
+    private final String identifier;
+    @GuardedBy("this")
+    private boolean closed =  false;
+
+    ShardedDOMDataWriteTransaction(final ShardedDOMDataTreeProducer producer, final Map<DOMDataTreeIdentifier, DOMStoreWriteTransaction> idToTransaction) {
+        this.producer = Preconditions.checkNotNull(producer);
+        this.idToTransaction = Preconditions.checkNotNull(idToTransaction);
+        this.identifier = "SHARDED-DOM-" + COUNTER.getAndIncrement();
+    }
+
+    // FIXME: use atomic operations
+    @GuardedBy("this")
+    private DOMStoreWriteTransaction lookup(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
+        final DOMDataTreeIdentifier id = new DOMDataTreeIdentifier(store, path);
+
+        for (Entry<DOMDataTreeIdentifier, DOMStoreWriteTransaction> e : idToTransaction.entrySet()) {
+            if (e.getKey().contains(id)) {
+                return e.getValue();
+            }
+        }
+
+        throw new IllegalArgumentException(String.format("Path %s is not acessible from transaction %s", id, this));
+    }
+
+    @Override
+    public String getIdentifier() {
+        return identifier;
+    }
+
+    @Override
+    public synchronized boolean cancel() {
+        if (closed) {
+            return false;
+        }
+
+        LOG.debug("Cancelling transaction {}", identifier);
+        for (DOMStoreWriteTransaction tx : ImmutableSet.copyOf(idToTransaction.values())) {
+            tx.close();
+        }
+
+        closed = true;
+        producer.cancelTransaction(this);
+        return true;
+    }
+
+    @Override
+    public synchronized CheckedFuture<Void, TransactionCommitFailedException> submit() {
+        Preconditions.checkState(!closed, "Transaction %s is already closed", identifier);
+
+        final Set<DOMStoreWriteTransaction> txns = ImmutableSet.copyOf(idToTransaction.values());
+        final List<DOMStoreThreePhaseCommitCohort> cohorts = new ArrayList<>(txns.size());
+        for (DOMStoreWriteTransaction tx : txns) {
+            cohorts.add(tx.ready());
+        }
+
+        try {
+            return Futures.immediateCheckedFuture(new CommitCoordinationTask(this, cohorts, null).call());
+        } catch (TransactionCommitFailedException e) {
+            return Futures.immediateFailedCheckedFuture(e);
+        }
+    }
+
+    @Override
+    @Deprecated
+    public ListenableFuture<RpcResult<TransactionStatus>> commit() {
+        return AbstractDataTransaction.convertToLegacyCommitFuture(submit());
+    }
+
+    @Override
+    public synchronized void delete(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
+        lookup(store, path).delete(path);
+    }
+
+    @Override
+    public synchronized void put(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+        lookup(store, path).write(path, data);
+    }
+
+    @Override
+    public synchronized void merge(final LogicalDatastoreType store, final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+        lookup(store, path).merge(path, data);
+    }
+}