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/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed 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.glowroot.common.live;

import java.util.List;
import java.util.Set;

import javax.annotation.Nullable;

import org.glowroot.agent.shaded.google.common.collect.ImmutableSet;
import org.immutables.value.Value;

import org.glowroot.common.util.Styles;
import org.glowroot.wire.api.model.AggregateOuterClass.Aggregate;
import org.glowroot.wire.api.model.ProfileTreeOuterClass.ProfileTree;

public interface LiveAggregateRepository {

    Set getLiveTransactionTypes(String serverId);

    // non-inclusive
    @Nullable
    LiveResult getLiveOverallSummary(String serverId, String transactionType,
            long from, long to) throws Exception;

    // non-inclusive
    @Nullable
    LiveResult> getLiveTransactionSummaries(String serverId,
            String transactionType, long from, long to) throws Exception;

    @Nullable
    LiveResult getLiveOverviewAggregates(String serverId, String transactionType,
            @Nullable String transactionName, long from, long to, long liveCaptureTime)
                    throws Exception;

    @Nullable
    LiveResult getLivePercentileAggregates(String serverId,
            String transactionType, @Nullable String transactionName, long from, long to,
            long liveCaptureTime) throws Exception;

    @Nullable
    LiveResult getLiveThroughputAggregates(String serverId,
            String transactionType, @Nullable String transactionName, long from, long to,
            long liveCaptureTime) throws Exception;

    @Nullable
    LiveResult getLiveProfileTree(String serverId, String transactionType,
            @Nullable String transactionName, long from, long to) throws Exception;

    @Nullable
    LiveResult> getLiveQueries(String serverId,
            String transactionType, @Nullable String transactionName, long from, long to)
                    throws Exception;

    @Nullable
    LiveResult getLiveOverallErrorSummary(String serverId,
            String transactionType, long from, long to) throws Exception;

    @Nullable
    LiveResult> getLiveTransactionErrorSummaries(String serverId,
            String transactionType, long from, long to) throws Exception;

    @Nullable
    LiveResult getLiveErrorPoints(String serverId, String transactionType,
            @Nullable String transactionName, long from, long to, long liveCaptureTime)
                    throws Exception;

    void clearAll();

    @Value.Immutable
    public interface OverallSummary {
        // aggregates use double instead of long to avoid (unlikely) 292 year nanosecond rollover
        double totalNanos();
        long transactionCount();
    }

    @Value.Immutable
    public interface TransactionSummary {
        String transactionName();
        // aggregates use double instead of long to avoid (unlikely) 292 year nanosecond rollover
        double totalNanos();
        long transactionCount();
    }

    @Value.Immutable
    public interface OverallErrorSummary {
        long errorCount();
        long transactionCount();
    }

    @Value.Immutable
    public interface TransactionErrorSummary {
        String transactionName();
        long errorCount();
        long transactionCount();
    }

    @Value.Immutable
    public interface OverviewAggregate {
        long captureTime();
        // aggregates use double instead of long to avoid (unlikely) 292 year nanosecond rollover
        double totalNanos();
        long transactionCount();
        double totalCpuNanos(); // -1 means N/A
        double totalBlockedNanos(); // -1 means N/A
        double totalWaitedNanos(); // -1 means N/A
        double totalAllocatedBytes(); // -1 means N/A
        List rootTimers();
    }

    @Value.Immutable
    public interface PercentileAggregate {
        long captureTime();
        // aggregates use double instead of long to avoid (unlikely) 292 year nanosecond rollover
        double totalNanos();
        long transactionCount();
        Aggregate.Histogram histogram();
    }

    @Value.Immutable
    @Styles.AllParameters
    public interface ThroughputAggregate {
        long captureTime();
        long transactionCount();
    }

    @Value.Immutable
    @Styles.AllParameters
    public interface ErrorPoint {
        long captureTime();
        long errorCount();
        long transactionCount();
    }

    public class LiveResult {

        private final List result;
        private final long initialCaptureTime;

        public LiveResult(List result, long initialCaptureTime) {
            this.result = result;
            this.initialCaptureTime = initialCaptureTime;
        }

        public List get() {
            return result;
        }

        public long initialCaptureTime() {
            return initialCaptureTime;
        }
    }

    public class LiveAggregateRepositoryNop implements LiveAggregateRepository {

        @Override
        public Set getLiveTransactionTypes(String serverId) {
            return ImmutableSet.of();
        }

        @Override
        public @Nullable LiveResult getLiveOverallSummary(String serverId,
                String transactionType, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult> getLiveTransactionSummaries(
                String serverId, String transactionType, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLiveOverviewAggregates(String serverId,
                String transactionType, @Nullable String transactionName, long from, long to,
                long liveCaptureTime) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLivePercentileAggregates(
                String serverId, String transactionType, @Nullable String transactionName,
                long from, long to, long liveCaptureTime) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLiveThroughputAggregates(
                String serverId, String transactionType, @Nullable String transactionName,
                long from, long to, long liveCaptureTime) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLiveProfileTree(String serverId,
                String transactionType, @Nullable String transactionName, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult> getLiveQueries(String serverId,
                String transactionType, @Nullable String transactionName, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLiveOverallErrorSummary(String serverId,
                String transactionType, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult> getLiveTransactionErrorSummaries(
                String serverId, String transactionType, long from, long to) {
            return null;
        }

        @Override
        public @Nullable LiveResult getLiveErrorPoints(String serverId,
                String transactionType, @Nullable String transactionName, long from, long to,
                long liveCaptureTime) {
            return null;
        }

        @Override
        public void clearAll() {}
    }
}