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BlobGCTask.java
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BlobGCTask.java
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/****************************************************************
* 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.james.server.blob.deduplication;
import java.time.Clock;
import java.time.Instant;
import java.util.Optional;
import java.util.Set;
import org.apache.james.blob.api.BlobReferenceSource;
import org.apache.james.blob.api.BlobStoreDAO;
import org.apache.james.blob.api.BucketName;
import org.apache.james.server.blob.deduplication.BloomFilterGCAlgorithm.Context;
import org.apache.james.task.Task;
import org.apache.james.task.TaskExecutionDetails;
import org.apache.james.task.TaskType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.scheduler.Schedulers;
public class BlobGCTask implements Task {
private static final Logger LOGGER = LoggerFactory.getLogger(BlobGCTask.class);
public static final TaskType TASK_TYPE = TaskType.of("BlobGCTask");
public static class AdditionalInformation implements TaskExecutionDetails.AdditionalInformation {
private static AdditionalInformation from(Context context) {
Context.Snapshot snapshot = context.snapshot();
return new AdditionalInformation(
snapshot.getReferenceSourceCount(),
snapshot.getBlobCount(),
snapshot.getGcedBlobCount(),
snapshot.getErrorCount(),
snapshot.getBloomFilterExpectedBlobCount(),
snapshot.getBloomFilterAssociatedProbability());
}
private final Instant timestamp;
private final long referenceSourceCount;
private final long blobCount;
private final long gcedBlobCount;
private final long errorCount;
private final long bloomFilterExpectedBlobCount;
private final double bloomFilterAssociatedProbability;
AdditionalInformation(long referenceSourceCount,
long blobCount,
long gcedBlobCount,
long errorCount,
long bloomFilterExpectedBlobCount,
double bloomFilterAssociatedProbability) {
this.referenceSourceCount = referenceSourceCount;
this.blobCount = blobCount;
this.gcedBlobCount = gcedBlobCount;
this.errorCount = errorCount;
this.bloomFilterExpectedBlobCount = bloomFilterExpectedBlobCount;
this.bloomFilterAssociatedProbability = bloomFilterAssociatedProbability;
this.timestamp = Clock.systemUTC().instant();
}
@Override
public Instant timestamp() {
return timestamp;
}
public Instant getTimestamp() {
return timestamp;
}
public long getReferenceSourceCount() {
return referenceSourceCount;
}
public long getBlobCount() {
return blobCount;
}
public long getGcedBlobCount() {
return gcedBlobCount;
}
public long getErrorCount() {
return errorCount;
}
public long getBloomFilterExpectedBlobCount() {
return bloomFilterExpectedBlobCount;
}
public double getBloomFilterAssociatedProbability() {
return bloomFilterAssociatedProbability;
}
}
private final BlobStoreDAO blobStoreDAO;
private final GenerationAwareBlobId.Factory generationAwareBlobIdFactory;
private final GenerationAwareBlobId.Configuration generationAwareBlobIdConfiguration;
private final Set<BlobReferenceSource> blobReferenceSources;
private final Clock clock;
private final BucketName bucketName;
private final int expectedBlobCount;
private final double associatedProbability;
private final Context context;
public BlobGCTask(BlobStoreDAO blobStoreDAO,
GenerationAwareBlobId.Factory generationAwareBlobIdFactory,
GenerationAwareBlobId.Configuration generationAwareBlobIdConfiguration,
Set<BlobReferenceSource> blobReferenceSources,
BucketName bucketName,
Clock clock,
int expectedBlobCount,
double associatedProbability) {
this.blobStoreDAO = blobStoreDAO;
this.generationAwareBlobIdFactory = generationAwareBlobIdFactory;
this.generationAwareBlobIdConfiguration = generationAwareBlobIdConfiguration;
this.blobReferenceSources = blobReferenceSources;
this.clock = clock;
this.bucketName = bucketName;
this.expectedBlobCount = expectedBlobCount;
this.associatedProbability = associatedProbability;
this.context = new Context(expectedBlobCount, associatedProbability);
}
@Override
public Result run() throws InterruptedException {
BloomFilterGCAlgorithm gcAlgorithm = new BloomFilterGCAlgorithm(
BlobReferenceAggregate.aggregate(blobReferenceSources),
blobStoreDAO,
generationAwareBlobIdFactory,
generationAwareBlobIdConfiguration,
clock);
return gcAlgorithm.gc(expectedBlobCount, associatedProbability, bucketName, context)
.subscribeOn(Schedulers.elastic())
.block();
}
@Override
public TaskType type() {
return TASK_TYPE;
}
@Override
public Optional<TaskExecutionDetails.AdditionalInformation> details() {
return Optional.of(AdditionalInformation.from(context));
}
}