scylla-jmx/src/main/java/org/apache/cassandra/streaming/SessionInfo.java

/*
 * 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.
 */

/*
 * Copyright 2015 ScyllaDB
 *
 * Modified by ScyllaDB
 */

package org.apache.cassandra.streaming;

import java.io.Serializable;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.json.JsonArray;
import javax.json.JsonObject;

import com.google.common.collect.Iterables;

/**
 * Stream session info.
 */
@SuppressWarnings("serial")
public final class SessionInfo implements Serializable {
    public final InetAddress peer;
    public final int sessionIndex;
    public final InetAddress connecting;
    /** Immutable collection of receiving summaries */
    public final Collection<StreamSummary> receivingSummaries;
    /** Immutable collection of sending summaries */
    public final Collection<StreamSummary> sendingSummaries;
    /** Current session state */
    public final StreamSession.State state;

    private final Map<String, ProgressInfo> receivingFiles;
    private final Map<String, ProgressInfo> sendingFiles;

    static InetAddress address(String val) {
        try {
            return InetAddress.getByName(val);
        } catch (UnknownHostException e) {
        }
        return null;
    }

    public SessionInfo(InetAddress peer, int sessionIndex, InetAddress connecting,
            Collection<StreamSummary> receivingSummaries, Collection<StreamSummary> sendingSummaries,
            StreamSession.State state, Map<String, ProgressInfo> receivingFiles,
            Map<String, ProgressInfo> sendingFiles) {
        this.peer = peer;
        this.sessionIndex = sessionIndex;
        this.connecting = connecting;
        this.receivingSummaries = receivingSummaries;
        this.sendingSummaries = sendingSummaries;
        this.receivingFiles = receivingFiles;
        this.sendingFiles = sendingFiles;
        this.state = state;
    }

    public SessionInfo(String peer, int sessionIndex, String connecting, Collection<StreamSummary> receivingSummaries,
            Collection<StreamSummary> sendingSummaries, String state, Map<String, ProgressInfo> receivingFiles,
            Map<String, ProgressInfo> sendingFiles) {
        this(address(peer), sessionIndex, address(connecting), receivingSummaries, sendingSummaries,
                StreamSession.State.valueOf(state), receivingFiles, sendingFiles);
    }

    ProgressInfo in;

    public static SessionInfo fromJsonObject(JsonObject obj) {
        return new SessionInfo(obj.getString("peer"), obj.getInt("session_index"), obj.getString("connecting"),
                StreamSummary.fromJsonArr(obj.getJsonArray("receiving_summaries")),
                StreamSummary.fromJsonArr(obj.getJsonArray("sending_summaries")), obj.getString("state"),
                ProgressInfo.fromJArrray(obj.getJsonArray("receiving_files")),
                ProgressInfo.fromJArrray(obj.getJsonArray("sending_files")));
    }

    public static Set<SessionInfo> fromJsonArr(JsonArray arr) {
        Set<SessionInfo> res = new HashSet<SessionInfo>();
        if (arr != null) {
            for (int i = 0; i < arr.size(); i++) {
                res.add(fromJsonObject(arr.getJsonObject(i)));
            }
        }
        return res;
    }

    public boolean isFailed() {
        return state == StreamSession.State.FAILED;
    }

    /**
     * Update progress of receiving/sending file.
     *
     * @param newProgress
     *            new progress info
     */
    public void updateProgress(ProgressInfo newProgress) {
        assert peer.equals(newProgress.peer);

        Map<String, ProgressInfo> currentFiles = newProgress.direction == ProgressInfo.Direction.IN ? receivingFiles
                : sendingFiles;
        currentFiles.put(newProgress.fileName, newProgress);
    }

    public Collection<ProgressInfo> getReceivingFiles() {
        return receivingFiles.values();
    }

    public Collection<ProgressInfo> getSendingFiles() {
        return sendingFiles.values();
    }

    /**
     * @return total number of files already received.
     */
    public long getTotalFilesReceived() {
        return getTotalFilesCompleted(receivingFiles.values());
    }

    /**
     * @return total number of files already sent.
     */
    public long getTotalFilesSent() {
        return getTotalFilesCompleted(sendingFiles.values());
    }

    /**
     * @return total size(in bytes) already received.
     */
    public long getTotalSizeReceived() {
        return getTotalSizeInProgress(receivingFiles.values());
    }

    /**
     * @return total size(in bytes) already sent.
     */
    public long getTotalSizeSent() {
        return getTotalSizeInProgress(sendingFiles.values());
    }

    /**
     * @return total number of files to receive in the session
     */
    public long getTotalFilesToReceive() {
        return getTotalFiles(receivingSummaries);
    }

    /**
     * @return total number of files to send in the session
     */
    public long getTotalFilesToSend() {
        return getTotalFiles(sendingSummaries);
    }

    /**
     * @return total size(in bytes) to receive in the session
     */
    public long getTotalSizeToReceive() {
        return getTotalSizes(receivingSummaries);
    }

    /**
     * @return total size(in bytes) to send in the session
     */
    public long getTotalSizeToSend() {
        return getTotalSizes(sendingSummaries);
    }

    private long getTotalSizeInProgress(Collection<ProgressInfo> files) {
        long total = 0;
        for (ProgressInfo file : files) {
            total += file.currentBytes;
        }
        return total;
    }

    private long getTotalFiles(Collection<StreamSummary> summaries) {
        long total = 0;
        for (StreamSummary summary : summaries) {
            total += summary.files;
        }
        return total;
    }

    private long getTotalSizes(Collection<StreamSummary> summaries) {
        if (summaries == null) {
            return 0;
        }
        long total = 0;
        for (StreamSummary summary : summaries) {
            total += summary.totalSize;
        }
        return total;
    }

    private long getTotalFilesCompleted(Collection<ProgressInfo> files) {
        Iterable<ProgressInfo> completed = Iterables.filter(files, input -> input.isCompleted());
        return Iterables.size(completed);
    }
}