X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FTransactionProxy.java;h=c85d32012fed9ee036a96b2e3663c061eabd0385;hp=609dea0b360819ebc576e636e2237b8cb9868172;hb=287dd97fc2375eb32186515ecfdac32ee1a36d83;hpb=f0f2ca29ae8b5caa769a77854fc5ac883b0a2264 diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java index 609dea0b36..c85d32012f 100644 --- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java +++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java @@ -8,57 +8,353 @@ package org.opendaylight.controller.cluster.datastore; +import akka.actor.ActorPath; +import akka.actor.ActorRef; +import akka.actor.ActorSelection; +import akka.actor.Props; import com.google.common.base.Optional; +import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; +import com.google.common.util.concurrent.ListenableFutureTask; +import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException; +import org.opendaylight.controller.cluster.datastore.messages.CloseTransaction; +import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction; +import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply; +import org.opendaylight.controller.cluster.datastore.messages.DeleteData; +import org.opendaylight.controller.cluster.datastore.messages.MergeData; +import org.opendaylight.controller.cluster.datastore.messages.ReadData; +import org.opendaylight.controller.cluster.datastore.messages.ReadDataReply; +import org.opendaylight.controller.cluster.datastore.messages.ReadyTransaction; +import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply; +import org.opendaylight.controller.cluster.datastore.messages.WriteData; +import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory; +import org.opendaylight.controller.cluster.datastore.utils.ActorContext; import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction; import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort; -import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier; +import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier; import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode; +import org.opendaylight.yangtools.yang.model.api.SchemaContext; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.Callable; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.atomic.AtomicLong; /** * TransactionProxy acts as a proxy for one or more transactions that were created on a remote shard - * + *

* Creating a transaction on the consumer side will create one instance of a transaction proxy. If during * the transaction reads and writes are done on data that belongs to different shards then a separate transaction will * be created on each of those shards by the TransactionProxy - * + *

+ *

* The TransactionProxy does not make any guarantees about atomicity or order in which the transactions on the various * shards will be executed. - * + *

*/ public class TransactionProxy implements DOMStoreReadWriteTransaction { + public enum TransactionType { + READ_ONLY, + WRITE_ONLY, + READ_WRITE + } + + private static final AtomicLong counter = new AtomicLong(); + + private static final Logger + LOG = LoggerFactory.getLogger(TransactionProxy.class); + + + private final TransactionType transactionType; + private final ActorContext actorContext; + private final Map remoteTransactionPaths = new HashMap<>(); + private final String identifier; + private final ExecutorService executor; + private final SchemaContext schemaContext; + + public TransactionProxy( + ActorContext actorContext, + TransactionType transactionType, + ExecutorService executor, + SchemaContext schemaContext + ) { + + this.identifier = actorContext.getCurrentMemberName() + "-txn-" + counter.getAndIncrement(); + this.transactionType = transactionType; + this.actorContext = actorContext; + this.executor = executor; + this.schemaContext = schemaContext; + + + } + @Override - public ListenableFuture>> read(InstanceIdentifier path) { - throw new UnsupportedOperationException("read"); + public ListenableFuture>> read(final YangInstanceIdentifier path) { + + createTransactionIfMissing(actorContext, path); + + return transactionContext(path).readData(path); } @Override - public void write(InstanceIdentifier path, NormalizedNode data) { - throw new UnsupportedOperationException("write"); + public void write(YangInstanceIdentifier path, NormalizedNode data) { + + createTransactionIfMissing(actorContext, path); + + transactionContext(path).writeData(path, data); } @Override - public void merge(InstanceIdentifier path, NormalizedNode data) { - throw new UnsupportedOperationException("merge"); + public void merge(YangInstanceIdentifier path, NormalizedNode data) { + + createTransactionIfMissing(actorContext, path); + + transactionContext(path).mergeData(path, data); } @Override - public void delete(InstanceIdentifier path) { - throw new UnsupportedOperationException("delete"); + public void delete(YangInstanceIdentifier path) { + + createTransactionIfMissing(actorContext, path); + + transactionContext(path).deleteData(path); } @Override public DOMStoreThreePhaseCommitCohort ready() { - throw new UnsupportedOperationException("ready"); + List cohortPaths = new ArrayList<>(); + + for(TransactionContext transactionContext : remoteTransactionPaths.values()) { + Object result = transactionContext.readyTransaction(); + + if(result.getClass().equals(ReadyTransactionReply.SERIALIZABLE_CLASS)){ + ReadyTransactionReply reply = ReadyTransactionReply.fromSerializable(actorContext.getActorSystem(),result); + String resolvedCohortPath = transactionContext + .getResolvedCohortPath(reply.getCohortPath().toString()); + cohortPaths.add(actorContext.actorFor(resolvedCohortPath)); + } + } + + return new ThreePhaseCommitCohortProxy(actorContext, cohortPaths, identifier, executor); } @Override public Object getIdentifier() { - throw new UnsupportedOperationException("getIdentifier"); + return this.identifier; } @Override public void close() { - throw new UnsupportedOperationException("close"); + for(TransactionContext transactionContext : remoteTransactionPaths.values()) { + transactionContext.closeTransaction(); + } + } + + private TransactionContext transactionContext(YangInstanceIdentifier path){ + String shardName = shardNameFromIdentifier(path); + return remoteTransactionPaths.get(shardName); + } + + private String shardNameFromIdentifier(YangInstanceIdentifier path){ + return ShardStrategyFactory.getStrategy(path).findShard(path); + } + + private void createTransactionIfMissing(ActorContext actorContext, YangInstanceIdentifier path) { + String shardName = ShardStrategyFactory.getStrategy(path).findShard(path); + + TransactionContext transactionContext = + remoteTransactionPaths.get(shardName); + + if(transactionContext != null){ + // A transaction already exists with that shard + return; + } + + try { + Object response = actorContext.executeShardOperation(shardName, + new CreateTransaction(identifier).toSerializable(), + ActorContext.ASK_DURATION); + if (response.getClass() + .equals(CreateTransactionReply.SERIALIZABLE_CLASS)) { + CreateTransactionReply reply = + CreateTransactionReply.fromSerializable(response); + + String transactionPath = reply.getTransactionPath(); + + LOG.info("Received transaction path = {}" , transactionPath ); + + ActorSelection transactionActor = + actorContext.actorSelection(transactionPath); + transactionContext = + new TransactionContextImpl(shardName, transactionPath, + transactionActor); + + remoteTransactionPaths.put(shardName, transactionContext); + } + } catch(TimeoutException e){ + remoteTransactionPaths.put(shardName, new NoOpTransactionContext(shardName)); + } } + + private interface TransactionContext { + String getShardName(); + + String getResolvedCohortPath(String cohortPath); + + public void closeTransaction(); + + public Object readyTransaction(); + + void deleteData(YangInstanceIdentifier path); + + void mergeData(YangInstanceIdentifier path, NormalizedNode data); + + ListenableFuture>> readData(final YangInstanceIdentifier path); + + void writeData(YangInstanceIdentifier path, NormalizedNode data); + } + + + private class TransactionContextImpl implements TransactionContext{ + private final String shardName; + private final String actorPath; + private final ActorSelection actor; + + + private TransactionContextImpl(String shardName, String actorPath, + ActorSelection actor) { + this.shardName = shardName; + this.actorPath = actorPath; + this.actor = actor; + } + + @Override public String getShardName() { + return shardName; + } + + private ActorSelection getActor() { + return actor; + } + + @Override public String getResolvedCohortPath(String cohortPath){ + return actorContext.resolvePath(actorPath, cohortPath); + } + + @Override public void closeTransaction() { + getActor().tell( + new CloseTransaction().toSerializable(), null); + } + + @Override public Object readyTransaction() { + return actorContext.executeRemoteOperation(getActor(), + new ReadyTransaction().toSerializable(), + ActorContext.ASK_DURATION + ); + + } + + @Override public void deleteData(YangInstanceIdentifier path) { + getActor().tell(new DeleteData(path).toSerializable(), null); + } + + @Override public void mergeData(YangInstanceIdentifier path, NormalizedNode data){ + getActor().tell(new MergeData(path, data, schemaContext).toSerializable(), null); + } + + @Override public ListenableFuture>> readData(final YangInstanceIdentifier path) { + + Callable>> call = new Callable() { + + @Override public Optional> call() throws Exception { + Object response = actorContext + .executeRemoteOperation(getActor(), new ReadData(path).toSerializable(), + ActorContext.ASK_DURATION); + if(response.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)){ + ReadDataReply reply = ReadDataReply.fromSerializable(schemaContext,path, response); + if(reply.getNormalizedNode() == null){ + return Optional.absent(); + } + //FIXME : A cast should not be required here ??? + return (Optional>) Optional.of(reply.getNormalizedNode()); + } + + return Optional.absent(); + } + }; + + ListenableFutureTask>> + future = ListenableFutureTask.create(call); + + executor.submit(future); + + return future; + } + + @Override public void writeData(YangInstanceIdentifier path, NormalizedNode data) { + getActor().tell(new WriteData(path, data, schemaContext).toSerializable(), null); + } + + } + + private class NoOpTransactionContext implements TransactionContext { + + private final Logger + LOG = LoggerFactory.getLogger(NoOpTransactionContext.class); + + private final String shardName; + + private ActorRef cohort; + + public NoOpTransactionContext(String shardName){ + this.shardName = shardName; + } + @Override public String getShardName() { + return shardName; + + } + + @Override public String getResolvedCohortPath(String cohortPath) { + return cohort.path().toString(); + } + + @Override public void closeTransaction() { + LOG.error("closeTransaction called"); + } + + @Override public Object readyTransaction() { + LOG.error("readyTransaction called"); + cohort = actorContext.getActorSystem().actorOf(Props.create(NoOpCohort.class)); + return new ReadyTransactionReply(cohort.path()).toSerializable(); + } + + @Override public void deleteData(YangInstanceIdentifier path) { + LOG.error("deleteData called path = {}", path); + } + + @Override public void mergeData(YangInstanceIdentifier path, + NormalizedNode data) { + LOG.error("mergeData called path = {}", path); + } + + @Override + public ListenableFuture>> readData( + YangInstanceIdentifier path) { + LOG.error("readData called path = {}", path); + return Futures.immediateFuture( + Optional.>absent()); + } + + @Override public void writeData(YangInstanceIdentifier path, + NormalizedNode data) { + LOG.error("writeData called path = {}", path); + } + } + + + }