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ensure in-order delivery of messages from replica to master;

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always pass operations to be sent to master into the queue so they
cannot be delivered to the master earlier than other queued operations
after connectivity has been restored

Change-Id: I7b1409dc4663659039058ce2c0511a26009114b4
This commit is contained in:
Axel Uhl
2019-01-22 14:31:58 +01:00
parent 112548b293
commit d2c3bdf2b5
15 changed files with 123 additions and 116 deletions
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java/com.sap.sse.filestorage/src/com/sap/sse/filestorage/impl/FileStorageManagementServiceImpl.java
+6 -6
View File
@@ -29,7 +29,7 @@ import com.sap.sse.replication.OperationWithResultWithIdWrapper;
import com.sap.sse.replication.OperationsToMasterSender;
import com.sap.sse.replication.ReplicationMasterDescriptor;
import com.sap.sse.replication.ReplicationService;
import com.sap.sse.replication.UnsentOperationsToMasterSender;
import com.sap.sse.replication.OperationsToMasterSendingQueue;
/**
* Implements {@link ServiceTrackerCustomizer} so that all {@link FileStorageServices} announced in the registry can
@@ -61,10 +61,10 @@ public class FileStorageManagementServiceImpl implements ReplicableFileStorageMa
/**
* This field is expected to be set by the {@link ReplicationService} once it has "adopted" this replicable.
* The {@link ReplicationService} "injects" this service so it can be used here as a delegate for the
* {@link UnsentOperationsToMasterSender#retrySendingLater(OperationWithResult, OperationsToMasterSender)}
* {@link OperationsToMasterSendingQueue#scheduleForSending(OperationWithResult, OperationsToMasterSender)}
* method.
*/
private UnsentOperationsToMasterSender unsentOperationForMasterQueue;
private OperationsToMasterSendingQueue unsentOperationForMasterQueue;
public FileStorageManagementServiceImpl(TypeBasedServiceFinder<FileStorageService> serviceFinder,
FileStorageServicePropertyStore propertyStore) {
@@ -248,15 +248,15 @@ public class FileStorageManagementServiceImpl implements ReplicableFileStorageMa
}
@Override
public void setUnsentOperationToMasterSender(UnsentOperationsToMasterSender service) {
public void setUnsentOperationToMasterSender(OperationsToMasterSendingQueue service) {
this.unsentOperationForMasterQueue = service;
}
@Override
public <S, O extends OperationWithResult<S, ?>, T> void retrySendingLater(
public <S, O extends OperationWithResult<S, ?>, T> void scheduleForSending(
OperationWithResult<S, T> operationWithResult, OperationsToMasterSender<S, O> sender) {
if (unsentOperationForMasterQueue != null) {
unsentOperationForMasterQueue.retrySendingLater(operationWithResult, sender);
unsentOperationForMasterQueue.scheduleForSending(operationWithResult, sender);
}
}
}