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Posted to dev@geode.apache.org by GitBox <gi...@apache.org> on 2020/04/21 20:26:58 UTC
[GitHub] [geode] pivotal-jbarrett commented on a change in pull request #4909: GEODE-7953: Restore Redundancy Internal API
pivotal-jbarrett commented on a change in pull request #4909:
URL: https://github.com/apache/geode/pull/4909#discussion_r412453438
##########
File path: geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyResults.java
##########
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.cache.control;
+
+import java.util.Map;
+
+import org.apache.geode.cache.partition.PartitionRebalanceInfo;
+import org.apache.geode.internal.cache.control.RegionRedundancyStatus;
+import org.apache.geode.internal.cache.partitioned.PartitionedRegionRebalanceOp;
+
+/**
+ * A class to collect the results of restore redundancy operations for one or more regions and
+ * determine the success of failure of the operation.
+ */
+public interface RestoreRedundancyResults {
+
+ /**
+ * {@link #SUCCESS} is defined as every included region having fully satisfied redundancy.
+ * {@link #FAILURE} is defined as at least one region that is configured to have redundant copies
+ * having fewer than its configured number of redundant copies.
+ * {@link #ERROR} is for cases when the restore redundancy operation was unable to begin or threw
+ * an exception.
+ */
+ enum Status {
+ SUCCESS,
+ FAILURE,
+ ERROR
+ }
+
+ /**
+ * Adds the contents of another {@link RestoreRedundancyResults} object to this one, including
+ * both {@link RegionRedundancyStatus} objects and information on the number of primaries
+ * reassigned and the time taken to reassign them.
+ *
+ * @param results a {@link RestoreRedundancyResults} object whose contents will be added to this
+ * one.
+ */
+ void addRegionResults(RestoreRedundancyResults results);
+
+ /**
+ * Adds information regarding the number of primaries reassigned and the time taken to reassign
+ * them during a restore redundancy operation.
+ *
+ * @param details a {@link PartitionRebalanceInfo} generated by a
+ * {@link PartitionedRegionRebalanceOp} operation.
Review comment:
If we had a proper API module these would be a compile time failure for any tests.
@upthewaterspout Seems like there should be a test in the static analyzer or other that should reject APIs like this.
##########
File path: geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyResults.java
##########
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.cache.control;
+
+import java.util.Map;
+
+import org.apache.geode.cache.partition.PartitionRebalanceInfo;
+import org.apache.geode.internal.cache.control.RegionRedundancyStatus;
+import org.apache.geode.internal.cache.partitioned.PartitionedRegionRebalanceOp;
+
+/**
+ * A class to collect the results of restore redundancy operations for one or more regions and
+ * determine the success of failure of the operation.
+ */
+public interface RestoreRedundancyResults {
+
+ /**
+ * {@link #SUCCESS} is defined as every included region having fully satisfied redundancy.
+ * {@link #FAILURE} is defined as at least one region that is configured to have redundant copies
+ * having fewer than its configured number of redundant copies.
+ * {@link #ERROR} is for cases when the restore redundancy operation was unable to begin or threw
+ * an exception.
+ */
+ enum Status {
+ SUCCESS,
+ FAILURE,
+ ERROR
+ }
+
+ /**
+ * Adds the contents of another {@link RestoreRedundancyResults} object to this one, including
+ * both {@link RegionRedundancyStatus} objects and information on the number of primaries
+ * reassigned and the time taken to reassign them.
+ *
+ * @param results a {@link RestoreRedundancyResults} object whose contents will be added to this
+ * one.
+ */
+ void addRegionResults(RestoreRedundancyResults results);
+
+ /**
+ * Adds information regarding the number of primaries reassigned and the time taken to reassign
+ * them during a restore redundancy operation.
+ *
+ * @param details a {@link PartitionRebalanceInfo} generated by a
+ * {@link PartitionedRegionRebalanceOp} operation.
+ */
+ void addPrimaryReassignmentDetails(PartitionRebalanceInfo details);
+
+ /**
+ * Adds one {@link RegionRedundancyStatus} to the result set.
+ *
+ * @param regionResult The {@link RegionRedundancyStatus} to be added to the result set.
+ */
+ void addRegionResult(RegionRedundancyStatus regionResult);
+
+ /**
+ * Returns the {@link Status} of this restore redundancy operation. Possible statuses are
+ * {@link Status#SUCCESS}, {@link Status#FAILURE} and {@link Status#ERROR}.
+ *
+ * @return The {@link Status} of this restore redundancy operation.
+ */
+ Status getStatus();
+
+ /**
+ * Returns a message describing the results of this restore redundancy operation.
+ *
+ * @return A {@link String} describing the results of this restore redundancy operation.
+ */
+ String getMessage();
+
+ /**
+ * Returns the {@link RegionRedundancyStatus} for a specific region or null if that region
+ * is not present in this {@link RestoreRedundancyResults}.
+ *
+ * @param regionName The region to which the {@link RegionRedundancyStatus} to be returned
+ * belongs.
+ * @return A {@link RegionRedundancyStatus} for the specified region or null if that region is not
+ * present in this {@link RestoreRedundancyResults}.
+ */
+ RegionRedundancyStatus getRegionResult(String regionName);
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with
+ * configured redundancy but zero actual redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with configured redundancy
+ * but zero actual redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getZeroRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with with
+ * at least one redundant copy, but fewer than the configured number of redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with at least one redundant
+ * copy, but fewer than the configured number of redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getUnderRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with
+ * redundancy satisfied.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with redundancy satisfied.
+ */
+ Map<String, RegionRedundancyStatus> getSatisfiedRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} contained in this
+ * {@link RestoreRedundancyResults}. This method may return the actual backing map depending on
+ * implementation.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults}.
+ */
+ Map<String, RegionRedundancyStatus> getRegionResults();
+
+ /**
+ * Returns the total number of primaries that were transferred as part of the restore redundancy
+ * operations.
+ *
+ * @return the total number of primaries that were transferred
+ */
+ int getTotalPrimaryTransfersCompleted();
Review comment:
Is it reasonable to assume we will never be able to transfer 2^31 or more primaries?
##########
File path: geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyResults.java
##########
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.cache.control;
+
+import java.util.Map;
+
+import org.apache.geode.cache.partition.PartitionRebalanceInfo;
+import org.apache.geode.internal.cache.control.RegionRedundancyStatus;
+import org.apache.geode.internal.cache.partitioned.PartitionedRegionRebalanceOp;
+
+/**
+ * A class to collect the results of restore redundancy operations for one or more regions and
+ * determine the success of failure of the operation.
+ */
+public interface RestoreRedundancyResults {
+
+ /**
+ * {@link #SUCCESS} is defined as every included region having fully satisfied redundancy.
+ * {@link #FAILURE} is defined as at least one region that is configured to have redundant copies
+ * having fewer than its configured number of redundant copies.
+ * {@link #ERROR} is for cases when the restore redundancy operation was unable to begin or threw
+ * an exception.
+ */
+ enum Status {
+ SUCCESS,
+ FAILURE,
+ ERROR
+ }
+
+ /**
+ * Adds the contents of another {@link RestoreRedundancyResults} object to this one, including
+ * both {@link RegionRedundancyStatus} objects and information on the number of primaries
+ * reassigned and the time taken to reassign them.
+ *
+ * @param results a {@link RestoreRedundancyResults} object whose contents will be added to this
+ * one.
+ */
+ void addRegionResults(RestoreRedundancyResults results);
+
+ /**
+ * Adds information regarding the number of primaries reassigned and the time taken to reassign
+ * them during a restore redundancy operation.
+ *
+ * @param details a {@link PartitionRebalanceInfo} generated by a
+ * {@link PartitionedRegionRebalanceOp} operation.
+ */
+ void addPrimaryReassignmentDetails(PartitionRebalanceInfo details);
+
+ /**
+ * Adds one {@link RegionRedundancyStatus} to the result set.
+ *
+ * @param regionResult The {@link RegionRedundancyStatus} to be added to the result set.
+ */
+ void addRegionResult(RegionRedundancyStatus regionResult);
+
+ /**
+ * Returns the {@link Status} of this restore redundancy operation. Possible statuses are
+ * {@link Status#SUCCESS}, {@link Status#FAILURE} and {@link Status#ERROR}.
+ *
+ * @return The {@link Status} of this restore redundancy operation.
+ */
+ Status getStatus();
+
+ /**
+ * Returns a message describing the results of this restore redundancy operation.
+ *
+ * @return A {@link String} describing the results of this restore redundancy operation.
+ */
+ String getMessage();
+
+ /**
+ * Returns the {@link RegionRedundancyStatus} for a specific region or null if that region
+ * is not present in this {@link RestoreRedundancyResults}.
+ *
+ * @param regionName The region to which the {@link RegionRedundancyStatus} to be returned
+ * belongs.
+ * @return A {@link RegionRedundancyStatus} for the specified region or null if that region is not
+ * present in this {@link RestoreRedundancyResults}.
+ */
+ RegionRedundancyStatus getRegionResult(String regionName);
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with
+ * configured redundancy but zero actual redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with configured redundancy
+ * but zero actual redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getZeroRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with with
+ * at least one redundant copy, but fewer than the configured number of redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with at least one redundant
+ * copy, but fewer than the configured number of redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getUnderRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} for regions with
+ * redundancy satisfied.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with redundancy satisfied.
+ */
+ Map<String, RegionRedundancyStatus> getSatisfiedRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses} contained in this
+ * {@link RestoreRedundancyResults}. This method may return the actual backing map depending on
+ * implementation.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults}.
+ */
+ Map<String, RegionRedundancyStatus> getRegionResults();
+
+ /**
+ * Returns the total number of primaries that were transferred as part of the restore redundancy
+ * operations.
+ *
+ * @return the total number of primaries that were transferred
+ */
+ int getTotalPrimaryTransfersCompleted();
+
+ /**
+ * Returns the total time, in milliseconds, spent transferring primaries as part of the restore
+ * redundancy operations.
+ *
+ * @return the total time, in milliseconds, spent transferring primaries
+ */
+ long getTotalPrimaryTransferTime();
Review comment:
We had discussion long ago about making sure time based APIs used `TimeUnit`. This method should be `long getTotalPrimaryTransferTime(TimeUnit unit)`. Alternatively we could consider `java.time.Duration`. Although that does incur an object allocation, given the infrequency that it is called the overhead is probably worth the correctness.
##########
File path: geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyBuilder.java
##########
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.geode.cache.control;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Factory for defining and starting a {@link CompletableFuture} that returns
+ * {@link RestoreRedundancyResults}.
+ */
+public interface RestoreRedundancyBuilder {
+ /**
+ * Specify which regions to include in the restore redundancy operation. The default,
+ * <code>null<code>, means all regions should be included. Includes take precedence over
+ * excludes.
+ *
+ * @param regions A set containing the names of regions to include.
+ */
+ RestoreRedundancyBuilder includeRegions(Set<String> regions);
+
+ /**
+ * Exclude specific regions from the restore redundancy operation. The default,
+ * <code>null<code>, means don't exclude any regions.
+ *
+ * @param regions A set containing the names of regions to exclude.
+ */
+ RestoreRedundancyBuilder excludeRegions(Set<String> regions);
+
+ /**
+ * Set whether the restore redundancy operation should reassign primary buckets. The default,
+ * <code>true</code>, will result in primary buckets being reassigned for better load balancing
+ * across members.
+ *
+ * @param shouldReassign A boolean indicating whether or not the operation created by this
+ * class should reassign primary bucket hosts.
+ */
+ RestoreRedundancyBuilder setReassignPrimaries(boolean shouldReassign);
Review comment:
I think `builder.shouldReassignPrimaries(true)` is more consistent with the other builder methods here. Otherwise I would change all to use the `set` prefix. Naming convention consistency is preferable.
##########
File path: geode-core/src/main/java/org/apache/geode/internal/cache/control/InternalResourceManager.java
##########
@@ -288,20 +294,20 @@ public RebalanceFactory createRebalanceFactory() {
@Override
public Set<RebalanceOperation> getRebalanceOperations() {
- synchronized (this.inProgressOperationsLock) {
- return new HashSet<RebalanceOperation>(this.inProgressOperations);
+ synchronized (this.inProgressRebalanceOperationsLock) {
+ return new HashSet<>(this.inProgressRebalanceOperations);
Review comment:
Maybe an unmodifiable set wrapped around a concurrent map?
Also the use of `this.` qualifier is not necessary in this context.
##########
File path: geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyBuilder.java
##########
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.geode.cache.control;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Factory for defining and starting a {@link CompletableFuture} that returns
+ * {@link RestoreRedundancyResults}.
+ */
+public interface RestoreRedundancyBuilder {
+ /**
+ * Specify which regions to include in the restore redundancy operation. The default,
+ * <code>null<code>, means all regions should be included. Includes take precedence over
+ * excludes.
+ *
+ * @param regions A set containing the names of regions to include.
+ */
+ RestoreRedundancyBuilder includeRegions(Set<String> regions);
+
+ /**
+ * Exclude specific regions from the restore redundancy operation. The default,
+ * <code>null<code>, means don't exclude any regions.
+ *
+ * @param regions A set containing the names of regions to exclude.
+ */
+ RestoreRedundancyBuilder excludeRegions(Set<String> regions);
+
+ /**
+ * Set whether the restore redundancy operation should reassign primary buckets. The default,
+ * <code>true</code>, will result in primary buckets being reassigned for better load balancing
+ * across members.
+ *
+ * @param shouldReassign A boolean indicating whether or not the operation created by this
+ * class should reassign primary bucket hosts.
+ */
+ RestoreRedundancyBuilder setReassignPrimaries(boolean shouldReassign);
+
+ /**
+ * Asynchronously starts a new restore redundancy operation. Only the cache resources used by this
+ * member will have redundancy restored. The operation may queue as needed for resources in
+ * contention by other active restore redundancy operations.
+ *
+ * @return a {@link CompletableFuture} which will return the results of the restore redundancy
+ * operation started by this method.
+ */
+ CompletableFuture<RestoreRedundancyResults> start();
Review comment:
A builder with a "start" method? I get that "build" doesn't feel right either. Maybe there is a better name for this class? `¯\_(ツ)_/¯`
##########
File path: geode-core/src/main/java/org/apache/geode/internal/cache/control/RestoreRedundancyResultsImpl.java
##########
@@ -0,0 +1,169 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.internal.cache.control;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.apache.geode.cache.control.RestoreRedundancyResults;
+import org.apache.geode.cache.partition.PartitionRebalanceInfo;
+
+public class RestoreRedundancyResultsImpl implements RestoreRedundancyResults, Serializable {
Review comment:
Again with the serialization here.
##########
File path: geode-core/src/main/java/org/apache/geode/internal/cache/control/RegionRedundancyStatus.java
##########
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.internal.cache.control;
+
+import java.io.Serializable;
+
+import org.apache.geode.internal.cache.PartitionedRegion;
+
+/**
+ * Used to calculate and store the redundancy status for a {@link PartitionedRegion}.
+ */
+public class RegionRedundancyStatus implements Serializable {
Review comment:
The only time I would say we should have Java Serializable classes is for testing. All other uses for client/server or p2p messaging should be `DataSerializableFixedId`. I wonder if our static analyzer could be updated to catch things like this?
##########
File path: geode-core/src/main/java/org/apache/geode/internal/cache/control/RegionRedundancyStatus.java
##########
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.geode.internal.cache.control;
+
+import java.io.Serializable;
+
+import org.apache.geode.internal.cache.PartitionedRegion;
+
+/**
+ * Used to calculate and store the redundancy status for a {@link PartitionedRegion}.
+ */
+public class RegionRedundancyStatus implements Serializable {
+ private static final long serialVersionUID = 3407539362166634316L;
+
+ public static final String OUTPUT_STRING =
+ "%s redundancy status: %s. Desired redundancy is %s and actual redundancy is %s.";
+
+ /**
+ * The name of the region used to create this object.
+ */
+ private final String regionName;
+
+ /**
+ * The configured redundancy of the region used to create this object.
+ */
+ private final int desiredRedundancy;
+
+ /**
+ * The actual redundancy of the region used to create this object at time of creation.
+ */
+ private final int actualRedundancy;
+
+ /**
+ * The {@link RedundancyStatus} of the region used to create this object at time of creation.
+ */
+ private final RedundancyStatus status;
+
+ /**
+ * The redundancy status of the region used to create this object at time of creation.
+ * {@link #SATISFIED} if every bucket in the region has the configured number of redundant copies
+ * {@link #NOT_SATISFIED} if at least one bucket in the region has less than the configured number
+ * of redundant copies
+ * {@link #NO_REDUNDANT_COPIES} if at least one bucket in the region has zero redundant copies and
+ * the region is not configured for zero redundancy
+ */
+ enum RedundancyStatus {
+ SATISFIED,
+ NOT_SATISFIED,
+ NO_REDUNDANT_COPIES
+ }
+
+ public RegionRedundancyStatus(PartitionedRegion region) {
+ regionName = region.getName();
+ desiredRedundancy = region.getRedundantCopies();
+ actualRedundancy = calculateLowestRedundancy(region);
+ status = determineStatus(desiredRedundancy, actualRedundancy);
+ }
+
+ public String getRegionName() {
+ return regionName;
+ }
+
+ public int getActualRedundancy() {
Review comment:
Javadoc, what does "Actual Redundancy" mean?
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