com.couchbase.cbadmin.client.RebalanceInfo.java Source code

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Here is the source code for com.couchbase.cbadmin.client.RebalanceInfo.java

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/*
 * Copyright (C) 2013 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */

package com.couchbase.cbadmin.client;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

/**
 * Object that contains information about a rebalance operation
 */
public class RebalanceInfo {
    final private Map<String, Number> details = new HashMap<String, Number>();
    private boolean completed = false;
    private boolean stopped = false;

    /**
     * Check if the rebalance is done
     * @return true if completed, false if in progress
     */
    public boolean isComplete() {
        return completed || stopped;
    }

    /**
     * Check if the rebalance was stopped (but the cluster is not balanced)
     * @return true if stopped
     */
    public boolean isStopped() {
        return stopped;
    }

    /**
     * Gets a percentage (between 0.0 and 100.0) indicating rebalance status.
     * @return
     */
    public float getProgress() {
        if (completed) {
            return 100;
        }

        float total = 0;
        for (Number f : details.values()) {
            total += f.floatValue();
        }
        return total / details.size();
    }

    public Map<String, Number> getDetails() {
        return Collections.unmodifiableMap(details);
    }

    public RebalanceInfo(JsonObject obj) throws RestApiException {
        JsonElement e = obj.get("status");
        if (e == null || e.isJsonPrimitive() == false) {
            throw new RestApiException("Expected status string", obj);
        }
        String sStatus = e.getAsString();
        if (sStatus.equals("none")) {
            completed = true;

        } else if (sStatus.equals("running")) {
            for (Entry<String, JsonElement> ent : obj.entrySet()) {
                if (ent.getKey().equals("status")) {
                    continue;
                }
                JsonObject progressObj;
                if (ent.getValue().isJsonObject() == false) {
                    throw new RestApiException("Expected object", ent.getValue());
                }
                progressObj = ent.getValue().getAsJsonObject();
                JsonElement progressNum = progressObj.get("progress");
                if (progressNum.isJsonPrimitive() == false
                        || progressNum.getAsJsonPrimitive().isNumber() == false) {
                    throw new RestApiException("Expected 'progress' to be number", progressNum);
                }
                details.put(ent.getKey(), progressNum.getAsNumber().floatValue() * 100);
            }
        }
    }
}