*/
package org.opendaylight.controller.md.sal.dom.store.impl;
-import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import java.util.Collections;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicLong;
+import javax.annotation.concurrent.GuardedBy;
+
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
+import org.opendaylight.controller.md.sal.dom.store.impl.SnapshotBackedWriteTransaction.TransactionReadyPrototype;
import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataPreconditionFailedException;
import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTree;
import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeCandidate;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransaction;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
import org.opendaylight.yangtools.concepts.AbstractListenerRegistration;
import org.opendaylight.yangtools.concepts.Identifiable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.base.Objects;
-import com.google.common.base.Objects.ToStringHelper;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
-public class InMemoryDOMDataStore implements DOMStore, Identifiable<String>, SchemaContextListener {
+/**
+ * In-memory DOM Data Store
+ *
+ * Implementation of {@link DOMStore} which uses {@link DataTree} and other
+ * classes such as {@link SnapshotBackedWriteTransaction}.
+ * {@link SnapshotBackedReadTransaction} and {@link ResolveDataChangeEventsTask}
+ * to implement {@link DOMStore} contract.
+ *
+ */
+public class InMemoryDOMDataStore implements DOMStore, Identifiable<String>, SchemaContextListener,
+ TransactionReadyPrototype {
private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMDataStore.class);
private final DataTree dataTree = InMemoryDataTreeFactory.getInstance().create();
private final ListenerTree listenerTree = ListenerTree.create();
return new SnapshotBackedWriteTransaction(nextIdentifier(), dataTree.takeSnapshot(), this);
}
+ @Override
+ public DOMStoreTransactionChain createTransactionChain() {
+ return new DOMStoreTransactionChainImpl();
+ }
+
@Override
public synchronized void onGlobalContextUpdated(final SchemaContext ctx) {
dataTree.setSchemaContext(ctx);
};
}
- private synchronized DOMStoreThreePhaseCommitCohort submit(final SnapshotBackedWriteTransaction writeTx) {
+ @Override
+ public synchronized DOMStoreThreePhaseCommitCohort ready(final SnapshotBackedWriteTransaction writeTx) {
LOG.debug("Tx: {} is submitted. Modifications: {}", writeTx.getIdentifier(), writeTx.getMutatedView());
return new ThreePhaseCommitImpl(writeTx);
}
return name + "-" + txCounter.getAndIncrement();
}
- private static abstract class AbstractDOMStoreTransaction implements DOMStoreTransaction {
- private final Object identifier;
+ private class DOMStoreTransactionChainImpl implements DOMStoreTransactionChain, TransactionReadyPrototype {
+
+ @GuardedBy("this")
+ private SnapshotBackedWriteTransaction latestOutstandingTx;
- protected AbstractDOMStoreTransaction(final Object identifier) {
- this.identifier = identifier;
+ private boolean chainFailed = false;
+
+ private void checkFailed() {
+ Preconditions.checkState(!chainFailed, "Transaction chain is failed.");
}
@Override
- public final Object getIdentifier() {
- return identifier;
+ public synchronized DOMStoreReadTransaction newReadOnlyTransaction() {
+ final DataTreeSnapshot snapshot;
+ checkFailed();
+ if (latestOutstandingTx != null) {
+ checkState(latestOutstandingTx.isReady(), "Previous transaction in chain must be ready.");
+ snapshot = latestOutstandingTx.getMutatedView();
+ } else {
+ snapshot = dataTree.takeSnapshot();
+ }
+ return new SnapshotBackedReadTransaction(nextIdentifier(), snapshot);
}
@Override
- public final String toString() {
- return addToStringAttributes(Objects.toStringHelper(this)).toString();
+ public synchronized DOMStoreReadWriteTransaction newReadWriteTransaction() {
+ final DataTreeSnapshot snapshot;
+ checkFailed();
+ if (latestOutstandingTx != null) {
+ checkState(latestOutstandingTx.isReady(), "Previous transaction in chain must be ready.");
+ snapshot = latestOutstandingTx.getMutatedView();
+ } else {
+ snapshot = dataTree.takeSnapshot();
+ }
+ final SnapshotBackedReadWriteTransaction ret = new SnapshotBackedReadWriteTransaction(nextIdentifier(),
+ snapshot, this);
+ latestOutstandingTx = ret;
+ return ret;
}
- /**
- * Add class-specific toString attributes.
- *
- * @param toStringHelper
- * ToStringHelper instance
- * @return ToStringHelper instance which was passed in
- */
- protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
- return toStringHelper.add("id", identifier);
+ @Override
+ public synchronized DOMStoreWriteTransaction newWriteOnlyTransaction() {
+ final DataTreeSnapshot snapshot;
+ checkFailed();
+ if (latestOutstandingTx != null) {
+ checkState(latestOutstandingTx.isReady(), "Previous transaction in chain must be ready.");
+ snapshot = latestOutstandingTx.getMutatedView();
+ } else {
+ snapshot = dataTree.takeSnapshot();
+ }
+ final SnapshotBackedWriteTransaction ret = new SnapshotBackedWriteTransaction(nextIdentifier(), snapshot,
+ this);
+ latestOutstandingTx = ret;
+ return ret;
}
- }
-
- private static final class SnapshotBackedReadTransaction extends AbstractDOMStoreTransaction implements
- DOMStoreReadTransaction {
- private DataTreeSnapshot stableSnapshot;
- public SnapshotBackedReadTransaction(final Object identifier, final DataTreeSnapshot snapshot) {
- super(identifier);
- this.stableSnapshot = Preconditions.checkNotNull(snapshot);
- LOG.debug("ReadOnly Tx: {} allocated with snapshot {}", identifier, snapshot);
+ @Override
+ public DOMStoreThreePhaseCommitCohort ready(final SnapshotBackedWriteTransaction tx) {
+ DOMStoreThreePhaseCommitCohort storeCohort = InMemoryDOMDataStore.this.ready(tx);
+ return new ChainedTransactionCommitImpl(tx, storeCohort, this);
}
@Override
public void close() {
- LOG.debug("Store transaction: {} : Closed", getIdentifier());
- stableSnapshot = null;
- }
- @Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
- checkNotNull(path, "Path must not be null.");
- checkState(stableSnapshot != null, "Transaction is closed");
- return Futures.immediateFuture(stableSnapshot.readNode(path));
}
- }
- private static class SnapshotBackedWriteTransaction extends AbstractDOMStoreTransaction implements
- DOMStoreWriteTransaction {
- private DataTreeModification mutableTree;
- private InMemoryDOMDataStore store;
- private boolean ready = false;
-
- public SnapshotBackedWriteTransaction(final Object identifier, final DataTreeSnapshot snapshot,
- final InMemoryDOMDataStore store) {
- super(identifier);
- mutableTree = snapshot.newModification();
- this.store = store;
- LOG.debug("Write Tx: {} allocated with snapshot {}", identifier, snapshot);
- }
+ protected synchronized void onTransactionFailed(final SnapshotBackedWriteTransaction transaction,
+ final Throwable t) {
+ chainFailed = true;
- @Override
- public void close() {
- LOG.debug("Store transaction: {} : Closed", getIdentifier());
- this.mutableTree = null;
- this.store = null;
}
- @Override
- public void write(final InstanceIdentifier path, final NormalizedNode<?, ?> data) {
- checkNotReady();
- try {
- LOG.trace("Tx: {} Write: {}:{}", getIdentifier(), path, data);
- mutableTree.write(path, data);
- // FIXME: Add checked exception
- } catch (Exception e) {
- LOG.error("Tx: {}, failed to write {}:{} in {}", getIdentifier(), path, data, mutableTree, e);
+ public synchronized void onTransactionCommited(final SnapshotBackedWriteTransaction transaction) {
+ // If commited transaction is latestOutstandingTx we clear
+ // latestOutstandingTx
+ // field in order to base new transactions on Datastore Data Tree
+ // directly.
+ if (transaction.equals(latestOutstandingTx)) {
+ latestOutstandingTx = null;
}
}
- @Override
- public void merge(final InstanceIdentifier path, final NormalizedNode<?, ?> data) {
- checkNotReady();
- try {
- LOG.trace("Tx: {} Merge: {}:{}", getIdentifier(), path, data);
- mutableTree.merge(path, data);
- // FIXME: Add checked exception
- } catch (Exception e) {
- LOG.error("Tx: {}, failed to write {}:{} in {}", getIdentifier(), path, data, mutableTree, e);
- }
- }
+ }
- @Override
- public void delete(final InstanceIdentifier path) {
- checkNotReady();
- try {
- LOG.trace("Tx: {} Delete: {}", getIdentifier(), path);
- mutableTree.delete(path);
- // FIXME: Add checked exception
- } catch (Exception e) {
- LOG.error("Tx: {}, failed to delete {} in {}", getIdentifier(), path, mutableTree, e);
- }
- }
+ private static class ChainedTransactionCommitImpl implements DOMStoreThreePhaseCommitCohort {
- protected final boolean isReady() {
- return ready;
- }
+ private final SnapshotBackedWriteTransaction transaction;
+ private final DOMStoreThreePhaseCommitCohort delegate;
+
+ private final DOMStoreTransactionChainImpl txChain;
- protected final void checkNotReady() {
- checkState(!ready, "Transaction %s is ready. No further modifications allowed.", getIdentifier());
+ protected ChainedTransactionCommitImpl(final SnapshotBackedWriteTransaction transaction,
+ final DOMStoreThreePhaseCommitCohort delegate, final DOMStoreTransactionChainImpl txChain) {
+ super();
+ this.transaction = transaction;
+ this.delegate = delegate;
+ this.txChain = txChain;
}
@Override
- public synchronized DOMStoreThreePhaseCommitCohort ready() {
- checkState(!ready, "Transaction %s is already ready.", getIdentifier());
- ready = true;
-
- LOG.debug("Store transaction: {} : Ready", getIdentifier());
- mutableTree.seal();
- return store.submit(this);
+ public ListenableFuture<Boolean> canCommit() {
+ return delegate.canCommit();
}
- protected DataTreeModification getMutatedView() {
- return mutableTree;
+ @Override
+ public ListenableFuture<Void> preCommit() {
+ return delegate.preCommit();
}
@Override
- protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
- return toStringHelper.add("ready", isReady());
+ public ListenableFuture<Void> abort() {
+ return delegate.abort();
}
- }
- private static class SnapshotBackedReadWriteTransaction extends SnapshotBackedWriteTransaction implements
- DOMStoreReadWriteTransaction {
+ @Override
+ public ListenableFuture<Void> commit() {
+ ListenableFuture<Void> commitFuture = delegate.commit();
+ Futures.addCallback(commitFuture, new FutureCallback<Void>() {
+ @Override
+ public void onFailure(final Throwable t) {
+ txChain.onTransactionFailed(transaction, t);
+ }
- protected SnapshotBackedReadWriteTransaction(final Object identifier, final DataTreeSnapshot snapshot,
- final InMemoryDOMDataStore store) {
- super(identifier, snapshot, store);
- }
+ @Override
+ public void onSuccess(final Void result) {
+ txChain.onTransactionCommited(transaction);
+ }
- @Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
- LOG.trace("Tx: {} Read: {}", getIdentifier(), path);
- try {
- return Futures.immediateFuture(getMutatedView().readNode(path));
- } catch (Exception e) {
- LOG.error("Tx: {} Failed Read of {}", getIdentifier(), path, e);
- throw e;
- }
+ });
+ return commitFuture;
}
+
}
private class ThreePhaseCommitImpl implements DOMStoreThreePhaseCommitCohort {
LOG.debug("Store Transaction: {} can be committed", transaction.getIdentifier());
return true;
} catch (DataPreconditionFailedException e) {
- LOG.warn("Store Tx: {} Data Precondition failed for {}.",transaction.getIdentifier(),e.getPath(),e);
+ LOG.warn("Store Tx: {} Data Precondition failed for {}.", transaction.getIdentifier(),
+ e.getPath(), e);
return false;
}
}
Code Review / controller.git / blobdiff