org.apache.apex.malhar.lib.state.managed.ManagedStateTestUtils.java Source code

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Here is the source code for org.apache.apex.malhar.lib.state.managed.ManagedStateTestUtils.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.apex.malhar.lib.state.managed;

import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;

import javax.annotation.Nullable;

import org.junit.Assert;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.apex.malhar.lib.utils.serde.BufferSlice;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.RemoteIterator;

import com.google.common.base.Function;
import com.google.common.collect.Maps;

import com.datatorrent.api.Attribute;
import com.datatorrent.api.Context;
import com.datatorrent.api.DAG;
import com.datatorrent.lib.fileaccess.FileAccess;
import com.datatorrent.lib.helper.OperatorContextTestHelper;
import com.datatorrent.lib.util.comparator.SliceComparator;
import com.datatorrent.netlet.util.Slice;

public class ManagedStateTestUtils {
    /**
     * Validates the bucket data on the File System.
     * @param fileAccess        file access
     * @param bucketId          bucket id
     * @param unsavedBucket     bucket data to compare with.
     * @param keysPerTimeBucket num keys per time bucket
     * @throws IOException
     */
    public static void validateBucketOnFileSystem(FileAccess fileAccess, long bucketId,
            Map<Slice, Bucket.BucketedValue> unsavedBucket, int keysPerTimeBucket) throws IOException {
        RemoteIterator<LocatedFileStatus> iterator = fileAccess.listFiles(bucketId);
        TreeMap<Slice, Slice> fromDisk = Maps.newTreeMap(new SliceComparator());
        int size = 0;
        while (iterator.hasNext()) {
            LocatedFileStatus fileStatus = iterator.next();

            String timeBucketStr = fileStatus.getPath().getName();
            if (timeBucketStr.equals(BucketsFileSystem.META_FILE_NAME) || timeBucketStr.endsWith(".tmp")) {
                //ignoring meta file
                continue;
            }

            LOG.debug("bucket {} time-bucket {}", bucketId, timeBucketStr);

            FileAccess.FileReader reader = fileAccess.getReader(bucketId, timeBucketStr);

            reader.readFully(fromDisk);
            size += keysPerTimeBucket;
            Assert.assertEquals("size of bucket " + bucketId, size, fromDisk.size());
        }

        Assert.assertEquals("size of bucket " + bucketId, unsavedBucket.size(), fromDisk.size());

        Map<Slice, Slice> testBucket = Maps.transformValues(unsavedBucket,
                new Function<Bucket.BucketedValue, Slice>() {
                    @Override
                    public Slice apply(@Nullable Bucket.BucketedValue input) {
                        assert input != null;
                        return input.getValue();
                    }
                });
        Assert.assertEquals("data of bucket" + bucketId, testBucket, fromDisk);
    }

    public static Map<Long, Map<Slice, Bucket.BucketedValue>> getTestData(int startBucket, int endBucket,
            int keyStart) {
        Map<Long, Map<Slice, Bucket.BucketedValue>> data = Maps.newHashMap();
        for (int i = startBucket; i < endBucket; i++) {
            Map<Slice, Bucket.BucketedValue> bucketData = getTestBucketData(keyStart, 100);
            data.put((long) i, bucketData);
        }
        return data;
    }

    public static Map<Slice, Bucket.BucketedValue> getTestBucketData(int keyStart, long timeBucketStart) {
        Map<Slice, Bucket.BucketedValue> bucketData = Maps.newHashMap();
        for (int j = 0; j < 5; j++) {
            Slice keyVal = new Slice(Integer.toString(keyStart).getBytes());
            bucketData.put(keyVal, new Bucket.BucketedValue(timeBucketStart + j, keyVal));
            keyStart++;
        }
        return bucketData;
    }

    public static Context.OperatorContext getOperatorContext(int operatorId, String applicationPath) {
        Attribute.AttributeMap.DefaultAttributeMap attributes = new Attribute.AttributeMap.DefaultAttributeMap();
        attributes.put(DAG.APPLICATION_PATH, applicationPath);
        return new OperatorContextTestHelper.TestIdOperatorContext(operatorId, attributes);
    }

    public static Context.OperatorContext getOperatorContext(int operatorId) {
        Attribute.AttributeMap.DefaultAttributeMap attributes = new Attribute.AttributeMap.DefaultAttributeMap();
        return new OperatorContextTestHelper.TestIdOperatorContext(operatorId, attributes);
    }

    private static final transient Logger LOG = LoggerFactory.getLogger(ManagedStateTestUtils.class);

    public static Slice getSliceFor(String x) {
        return new BufferSlice(x.getBytes());
    }
}