X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatabroker%2Factors%2Fdds%2FAbstractProxyTransaction.java;h=0ba660234a15cee42c84f1c00b61d2ad2ef244e6;hb=refs%2Fchanges%2F50%2F49250%2F5;hp=36f9a4bccbe07e762dd8f4778ae4809fc4a2487a;hpb=b4d95acff78952020e9fbde4372d13b461fd7469;p=controller.git

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/AbstractProxyTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/AbstractProxyTransaction.java
index 36f9a4bccb..0ba660234a 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/AbstractProxyTransaction.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/AbstractProxyTransaction.java
@@ -199,16 +199,19 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
     }
 
     final void delete(final YangInstanceIdentifier path) {
+        checkReadWrite();
         checkNotSealed();
         doDelete(path);
     }
 
     final void merge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+        checkReadWrite();
         checkNotSealed();
         doMerge(path, data);
     }
 
     final void write(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+        checkReadWrite();
         checkNotSealed();
         doWrite(path, data);
     }
@@ -235,6 +238,16 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
         // Transition user-visible state first
         final boolean success = SEALED_UPDATER.compareAndSet(this, 0, 1);
         Preconditions.checkState(success, "Proxy %s was already sealed", getIdentifier());
+        internalSeal();
+    }
+
+    final void ensureSealed() {
+        if (SEALED_UPDATER.compareAndSet(this, 0, 1)) {
+            internalSeal();
+        }
+    }
+
+    private void internalSeal() {
         doSeal();
         parent.onTransactionSealed(this);
 
@@ -247,7 +260,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
             // still stuck here. The successor has not seen final part of our state, nor the fact it is sealed.
             // Propagate state and seal the successor.
             flushState(successor);
-            successor.seal();
+            successor.ensureSealed();
         }
     }
 
@@ -265,6 +278,12 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
         return (SuccessorState) local;
     }
 
+    private void checkReadWrite() {
+        if (isSnapshotOnly()) {
+            throw new UnsupportedOperationException("Transaction " + getIdentifier() + " is a read-only snapshot");
+        }
+    }
+
     final void recordSuccessfulRequest(final @Nonnull TransactionRequest<?> req) {
         successfulRequests.add(Verify.verifyNotNull(req));
     }
@@ -317,6 +336,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
      * @return Future completion
      */
     final ListenableFuture<Boolean> directCommit() {
+        checkReadWrite();
         checkSealed();
 
         // Precludes startReconnect() from interfering with the fast path
@@ -346,6 +366,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
     }
 
     final void canCommit(final VotingFuture<?> ret) {
+        checkReadWrite();
         checkSealed();
 
         // Precludes startReconnect() from interfering with the fast path
@@ -379,6 +400,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
     }
 
     final void preCommit(final VotingFuture<?> ret) {
+        checkReadWrite();
         checkSealed();
 
         final TransactionRequest<?> req = new TransactionPreCommitRequest(getIdentifier(), nextSequence(),
@@ -398,6 +420,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
     }
 
     final void doCommit(final VotingFuture<?> ret) {
+        checkReadWrite();
         checkSealed();
 
         sendRequest(new TransactionDoCommitRequest(getIdentifier(), nextSequence(), localActor()), t -> {
@@ -473,7 +496,7 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
         if (SEALED.equals(prevState)) {
             LOG.debug("Proxy {} reconnected while being sealed, propagating state to successor {}", this, successor);
             flushState(successor);
-            successor.seal();
+            successor.ensureSealed();
         }
     }
 
@@ -505,6 +528,8 @@ abstract class AbstractProxyTransaction implements Identifiable<TransactionIdent
         }
     }
 
+    abstract boolean isSnapshotOnly();
+
     abstract void doDelete(final YangInstanceIdentifier path);
 
     abstract void doMerge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data);