Migrate users of Optional.get()

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / databroker / actors / dds / LocalReadOnlyProxyTransaction.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/LocalReadOnlyProxyTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/LocalReadOnlyProxyTransaction.java
index eb2362d88df5026916b3b6770cca0dba59131696..6d019af1a19383b460ff95524a02b501cb12aa30 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/LocalReadOnlyProxyTransaction.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/LocalReadOnlyProxyTransaction.java
@@ -7,41 +7,39 @@
  */
 package org.opendaylight.controller.cluster.databroker.actors.dds;
 
-import com.google.common.base.Preconditions;
-import com.google.common.base.Verify;
+import static com.google.common.base.Verify.verify;
+import static com.google.common.base.Verify.verifyNotNull;
+import static java.util.Objects.requireNonNull;
+
+import java.util.Optional;
 import java.util.function.Consumer;
-import javax.annotation.concurrent.NotThreadSafe;
-import org.opendaylight.controller.cluster.access.commands.AbortLocalTransactionRequest;
 import org.opendaylight.controller.cluster.access.commands.CommitLocalTransactionRequest;
 import org.opendaylight.controller.cluster.access.commands.ModifyTransactionRequest;
 import org.opendaylight.controller.cluster.access.commands.PersistenceProtocol;
-import org.opendaylight.controller.cluster.access.commands.TransactionRequest;
 import org.opendaylight.controller.cluster.access.concepts.Response;
 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
-import org.opendaylight.controller.cluster.datastore.util.AbstractDataTreeModificationCursor;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.opendaylight.yangtools.yang.data.tree.api.DataTreeSnapshot;
 
 /**
- * A read-only specialization of {@link LocalProxyTransaction}.
+ * A read-only specialization of {@link LocalProxyTransaction}. This class is NOT thread-safe.
  *
  * @author Robert Varga
  */
-@NotThreadSafe
 final class LocalReadOnlyProxyTransaction extends LocalProxyTransaction {
-    private static final Logger LOG = LoggerFactory.getLogger(LocalReadOnlyProxyTransaction.class);
-
     private final DataTreeSnapshot snapshot;
 
     LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier,
         final DataTreeSnapshot snapshot) {
-        super(parent, identifier);
-        this.snapshot = Preconditions.checkNotNull(snapshot);
+        super(parent, identifier, false);
+        this.snapshot = requireNonNull(snapshot);
+    }
+
+    LocalReadOnlyProxyTransaction(final ProxyHistory parent, final TransactionIdentifier identifier) {
+        super(parent, identifier, true);
+        // It is an error to touch snapshot once we are DONE
+        snapshot = null;
     }
 
     @Override
@@ -51,83 +49,53 @@ final class LocalReadOnlyProxyTransaction extends LocalProxyTransaction {
 
     @Override
     DataTreeSnapshot readOnlyView() {
-        return snapshot;
+        return verifyNotNull(snapshot, "Transaction %s is DONE", getIdentifier());
     }
 
     @Override
     void doDelete(final YangInstanceIdentifier path) {
-        throw new UnsupportedOperationException("Read-only snapshot");
+        throw new UnsupportedOperationException("doDelete");
     }
 
     @Override
-    void doMerge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
-        throw new UnsupportedOperationException("Read-only snapshot");
+    void doMerge(final YangInstanceIdentifier path, final NormalizedNode data) {
+        throw new UnsupportedOperationException("doMerge");
     }
 
     @Override
-    void doWrite(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
-        throw new UnsupportedOperationException("Read-only snapshot");
+    void doWrite(final YangInstanceIdentifier path, final NormalizedNode data) {
+        throw new UnsupportedOperationException("doWrite");
     }
 
     @Override
     CommitLocalTransactionRequest commitRequest(final boolean coordinated) {
-        throw new UnsupportedOperationException("Read-only snapshot");
+        throw new UnsupportedOperationException("commitRequest");
     }
 
     @Override
-    void doSeal() {
+    Optional<ModifyTransactionRequest> flushState() {
         // No-op
+        return Optional.empty();
     }
 
     @Override
-    void flushState(final AbstractProxyTransaction successor) {
-        // No-op
-    }
-
-    @Override
-    void applyModifyTransactionRequest(final ModifyTransactionRequest request,
+    void applyForwardedModifyTransactionRequest(final ModifyTransactionRequest request,
             final Consumer<Response<?, ?>> callback) {
-        Verify.verify(request.getModifications().isEmpty());
-
-        final PersistenceProtocol protocol = request.getPersistenceProtocol().get();
-        Verify.verify(protocol == PersistenceProtocol.ABORT);
+        commonModifyTransactionRequest(request);
         abort();
     }
 
     @Override
-    void forwardToRemote(final RemoteProxyTransaction successor, final TransactionRequest<?> request,
-            final Consumer<Response<?, ?>> callback) {
-        if (request instanceof CommitLocalTransactionRequest) {
-            final CommitLocalTransactionRequest req = (CommitLocalTransactionRequest) request;
-            final DataTreeModification mod = req.getModification();
-
-            LOG.debug("Applying modification {} to successor {}", mod, successor);
-            mod.applyToCursor(new AbstractDataTreeModificationCursor() {
-                @Override
-                public void write(final PathArgument child, final NormalizedNode<?, ?> data) {
-                    successor.write(current().node(child), data);
-                }
-
-                @Override
-                public void merge(final PathArgument child, final NormalizedNode<?, ?> data) {
-                    successor.merge(current().node(child), data);
-                }
-
-                @Override
-                public void delete(final PathArgument child) {
-                    successor.delete(current().node(child));
-                }
-            });
-
-            successor.seal();
-
-            final ModifyTransactionRequest successorReq = successor.commitRequest(req.isCoordinated());
-            successor.sendRequest(successorReq, callback);
-        } else if (request instanceof AbortLocalTransactionRequest) {
-            LOG.debug("Forwarding abort {} to successor {}", request, successor);
-            successor.abort();
-        } else {
-            throw new IllegalArgumentException("Unhandled request" + request);
-        }
+    void replayModifyTransactionRequest(final ModifyTransactionRequest request,
+            final Consumer<Response<?, ?>> callback, final long enqueuedTicks) {
+        commonModifyTransactionRequest(request);
+        enqueueAbort(callback, enqueuedTicks);
+    }
+
+    private static void commonModifyTransactionRequest(final ModifyTransactionRequest request) {
+        verify(request.getModifications().isEmpty());
+
+        final PersistenceProtocol protocol = request.getPersistenceProtocol().orElseThrow();
+        verify(protocol == PersistenceProtocol.ABORT);
     }
 }