org.apache.drill.exec.store.sys.ProfileInfoIterator.java Source code

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Here is the source code for org.apache.drill.exec.store.sys.ProfileInfoIterator.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.drill.exec.store.sys;

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

import org.apache.drill.exec.ops.ExecutorFragmentContext;
import org.apache.drill.exec.proto.UserBitShared;
import org.apache.drill.exec.proto.UserBitShared.QueryProfile;

import javax.annotation.Nullable;
import java.sql.Timestamp;
import java.util.Iterator;
import java.util.Map.Entry;

/**
 * System table listing completed profiles
 */
public class ProfileInfoIterator extends ProfileIterator {
    static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ProfileInfoIterator.class);

    private final Iterator<ProfileInfo> itr;

    public ProfileInfoIterator(ExecutorFragmentContext context, int maxRecords) {
        super(context, maxRecords);
        this.itr = iterateProfileInfo();
    }

    @Override
    protected Iterator<Entry<String, QueryProfile>> getProfiles(int skip, int take) {
        return profileStoreContext.getCompletedProfileStore().getRange(skip, take);
    }

    //Returns an iterator for authorized profiles
    private Iterator<ProfileInfo> iterateProfileInfo() {
        try {
            //Transform authorized profiles to iterator for ProfileInfo
            return transform(getAuthorizedProfiles(queryingUsername, isAdmin));
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            return Iterators.singletonIterator(ProfileInfo.getDefault());
        }
    }

    /**
     * Iterating persistentStore as a iterator of {@link org.apache.drill.exec.store.sys.ProfileInfoIterator.ProfileInfo}.
     */
    private Iterator<ProfileInfo> transform(Iterator<Entry<String, UserBitShared.QueryProfile>> all) {
        return Iterators.transform(all, new Function<Entry<String, UserBitShared.QueryProfile>, ProfileInfo>() {
            @Nullable
            @Override
            public ProfileInfo apply(@Nullable Entry<String, UserBitShared.QueryProfile> input) {
                if (input == null || input.getValue() == null) {
                    return ProfileInfo.getDefault();
                }

                //Constructing ProfileInfo
                final String queryID = input.getKey();
                final QueryProfile profile = input.getValue();
                //For cases where query was never queued
                final long assumedQueueEndTime = profile.getQueueWaitEnd() > 0 ? profile.getQueueWaitEnd()
                        : profile.getPlanEnd();
                return new ProfileInfo(queryID, new Timestamp(profile.getStart()),
                        profile.getForeman().getAddress(), profile.getTotalFragments(), profile.getUser(),
                        profile.getQueueName(), computeDuration(profile.getStart(), profile.getPlanEnd()),
                        computeDuration(profile.getPlanEnd(), assumedQueueEndTime),
                        computeDuration(assumedQueueEndTime, profile.getEnd()), profile.getState().name(),
                        profile.getQuery());
            }
        });
    }

    @Override
    public boolean hasNext() {
        return itr.hasNext();
    }

    @Override
    public Object next() {
        return itr.next();
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException();
    }

    public static class ProfileInfo {
        private static final String UNKNOWN_VALUE = "N/A";

        private static final ProfileInfo DEFAULT = new ProfileInfo();

        public final String queryId;
        public final Timestamp startTime;
        public final String foreman;
        public final long fragments;
        public final String user;
        public final String queue;
        public final long planTime;
        public final long queueTime;
        public final long executeTime;
        public final long totalTime;
        public final String state;
        public final String query;

        public ProfileInfo(String query_id, Timestamp time, String foreman, long fragmentCount, String username,
                String queueName, long planDuration, long queueWaitDuration, long executeDuration, String state,
                String query) {
            this.queryId = query_id;
            this.startTime = time;
            this.foreman = foreman;
            this.fragments = fragmentCount;
            this.user = username;
            this.queue = queueName;
            this.planTime = planDuration;
            this.queueTime = queueWaitDuration;
            this.executeTime = executeDuration;
            this.totalTime = this.planTime + this.queueTime + this.executeTime;
            this.query = query;
            this.state = state;
        }

        private ProfileInfo() {
            this(UNKNOWN_VALUE, new Timestamp(0), UNKNOWN_VALUE, 0L, UNKNOWN_VALUE, UNKNOWN_VALUE, 0L, 0L, 0L,
                    UNKNOWN_VALUE, UNKNOWN_VALUE);
        }

        /**
         * If unable to get ProfileInfo, use this default instance instead.
         * @return the default instance
         */
        public static ProfileInfo getDefault() {
            return DEFAULT;
        }
    }
}