gecko-dev/dom/resourcestats/ResourceStatsDB.jsm

539 строки
16 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*/
"use strict";
this.EXPORTED_SYMBOLS = ['ResourceStatsDB'];
const DEBUG = false;
function debug(s) { dump("-*- ResourceStatsDB: " + s + "\n"); }
const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
Cu.import("resource://gre/modules/IndexedDBHelper.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.importGlobalProperties(["indexedDB"]);
XPCOMUtils.defineLazyServiceGetter(this, "appsService",
"@mozilla.org/AppsService;1",
"nsIAppsService");
const DB_NAME = "resource_stats";
const DB_VERSION = 1;
const POWER_STATS_STORE = "power_stats_store";
const NETWORK_STATS_STORE = "network_stats_store";
const ALARM_STORE = "alarm_store";
const statsStoreNames = {
power: POWER_STATS_STORE,
network: NETWORK_STATS_STORE
};
// Constant defining the sampling rate.
const SAMPLE_RATE = 24 * 60 * 60 * 1000; // 1 day.
// Constant defining the MAX age of stored stats.
const MAX_STORAGE_AGE = 180 * SAMPLE_RATE; // 180 days.
this.ResourceStatsDB = function ResourceStatsDB() {
if (DEBUG) {
debug("Constructor()");
}
this.initDBHelper(DB_NAME, DB_VERSION,
[POWER_STATS_STORE, NETWORK_STATS_STORE, ALARM_STORE]);
};
ResourceStatsDB.prototype = {
__proto__: IndexedDBHelper.prototype,
_dbNewTxn: function(aStoreName, aTxnType, aCallback, aTxnCb) {
function successCb(aResult) {
aTxnCb(null, aResult);
}
function errorCb(aError) {
aTxnCb(aError, null);
}
return this.newTxn(aTxnType, aStoreName, aCallback, successCb, errorCb);
},
upgradeSchema: function(aTransaction, aDb, aOldVersion, aNewVersion) {
if (DEBUG) {
debug("Upgrade DB from ver." + aOldVersion + " to ver." + aNewVersion);
}
let objectStore;
// Create PowerStatsStore.
objectStore = aDb.createObjectStore(POWER_STATS_STORE, {
keyPath: ["appId", "serviceType", "component", "timestamp"]
});
objectStore.createIndex("component", "component", { unique: false });
// Create NetworkStatsStore.
objectStore = aDb.createObjectStore(NETWORK_STATS_STORE, {
keyPath: ["appId", "serviceType", "component", "timestamp"]
});
objectStore.createIndex("component", "component", { unique: false });
// Create AlarmStore.
objectStore = aDb.createObjectStore(ALARM_STORE, {
keyPath: "alarmId",
autoIncrement: true
});
objectStore.createIndex("type", "type", { unique: false });
// Index for resource control target.
objectStore.createIndex("controlTarget",
["type", "manifestURL", "serviceType", "component"],
{ unique: false });
},
// Convert to UTC according to the current timezone and the filter timestamp
// to get SAMPLE_RATE precission.
_normalizeTime: function(aTime, aOffset) {
let time = Math.floor((aTime - aOffset) / SAMPLE_RATE) * SAMPLE_RATE;
return time;
},
/**
* aRecordArray contains an array of json objects storing network stats.
* The structure of the json object =
* {
* appId: XX,
* serviceType: "XX",
* componentStats: {
* "component_1": { receivedBytes: XX, sentBytes: XX },
* "component_2": { receivedBytes: XX, sentBytes: XX },
* ...
* },
* }
*/
saveNetworkStats: function(aRecordArray, aTimestamp, aResultCb) {
if (DEBUG) {
debug("saveNetworkStats()");
}
let offset = (new Date()).getTimezoneOffset() * 60 * 1000;
let timestamp = this._normalizeTime(aTimestamp, offset);
this._dbNewTxn(NETWORK_STATS_STORE, "readwrite", function(aTxn, aStore) {
aRecordArray.forEach(function(aRecord) {
let stats = {
appId: aRecord.appId,
serviceType: aRecord.serviceType,
component: "",
timestamp: timestamp,
receivedBytes: 0,
sentBytes: 0
};
let totalReceivedBytes = 0;
let totalSentBytes = 0;
// Save stats of each component.
let data = aRecord.componentStats;
for (let component in data) {
// Save stats to database.
stats.component = component;
stats.receivedBytes = data[component].receivedBytes;
stats.sentBytes = data[component].sentBytes;
aStore.put(stats);
if (DEBUG) {
debug("Save network stats: " + JSON.stringify(stats));
}
// Accumulated to tatal stats.
totalReceivedBytes += stats.receivedBytes;
totalSentBytes += stats.sentBytes;
}
// Save total stats.
stats.component = "";
stats.receivedBytes = totalReceivedBytes;
stats.sentBytes = totalSentBytes;
aStore.put(stats);
if (DEBUG) {
debug("Save network stats: " + JSON.stringify(stats));
}
});
}, aResultCb);
},
/**
* aRecordArray contains an array of json objects storing power stats.
* The structure of the json object =
* {
* appId: XX,
* serviceType: "XX",
* componentStats: {
* "component_1": XX, // consumedPower
* "component_2": XX,
* ...
* },
* }
*/
savePowerStats: function(aRecordArray, aTimestamp, aResultCb) {
if (DEBUG) {
debug("savePowerStats()");
}
let offset = (new Date()).getTimezoneOffset() * 60 * 1000;
let timestamp = this._normalizeTime(aTimestamp, offset);
this._dbNewTxn(POWER_STATS_STORE, "readwrite", function(aTxn, aStore) {
aRecordArray.forEach(function(aRecord) {
let stats = {
appId: aRecord.appId,
serviceType: aRecord.serviceType,
component: "",
timestamp: timestamp,
consumedPower: aRecord.totalStats
};
let totalConsumedPower = 0;
// Save stats of each component to database.
let data = aRecord.componentStats;
for (let component in data) {
// Save stats to database.
stats.component = component;
stats.consumedPower = data[component];
aStore.put(stats);
if (DEBUG) {
debug("Save power stats: " + JSON.stringify(stats));
}
// Accumulated to total stats.
totalConsumedPower += stats.consumedPower;
}
// Save total stats.
stats.component = "";
stats.consumedPower = totalConsumedPower;
aStore.put(stats);
if (DEBUG) {
debug("Save power stats: " + JSON.stringify(stats));
}
});
}, aResultCb);
},
// Get stats from a store.
getStats: function(aType, aManifestURL, aServiceType, aComponent,
aStart, aEnd, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.getStats()");
}
let offset = (new Date()).getTimezoneOffset() * 60 * 1000;
// Get appId and check whether manifestURL is a valid app.
let appId = 0;
if (aManifestURL) {
appId = appsService.getAppLocalIdByManifestURL(aManifestURL);
if (!appId) {
aResultCb("Invalid manifestURL", null);
return;
}
}
// Get store name.
let storeName = statsStoreNames[aType];
// Normalize start time and end time to SAMPLE_RATE precission.
let start = this._normalizeTime(aStart, offset);
let end = this._normalizeTime(aEnd, offset);
if (DEBUG) {
debug("Query time range: " + start + " to " + end);
debug("[appId, serviceType, component] = [" + appId + ", " + aServiceType
+ ", " + aComponent + "]");
}
// Create filters.
let lowerFilter = [appId, aServiceType, aComponent, start];
let upperFilter = [appId, aServiceType, aComponent, end];
// Execute DB query.
this._dbNewTxn(storeName, "readonly", function(aTxn, aStore) {
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
let statsData = [];
if (!aTxn.result) {
aTxn.result = Object.create(null);
}
aTxn.result.type = aType;
aTxn.result.component = aComponent;
aTxn.result.serviceType = aServiceType;
aTxn.result.manifestURL = aManifestURL;
aTxn.result.start = start + offset;
aTxn.result.end = end + offset;
// Since ResourceStats() would require SAMPLE_RATE when filling the empty
// entries of statsData array, we append SAMPLE_RATE to the result field
// to save an IPC call.
aTxn.result.sampleRate = SAMPLE_RATE;
let request = aStore.openCursor(range, "prev");
if (aType == "power") {
request.onsuccess = function(aEvent) {
var cursor = aEvent.target.result;
if (cursor) {
if (DEBUG) {
debug("Get " + JSON.stringify(cursor.value));
}
// Covert timestamp to current timezone.
statsData.push({
timestamp: cursor.value.timestamp + offset,
consumedPower: cursor.value.consumedPower
});
cursor.continue();
return;
}
aTxn.result.statsData = statsData;
};
} else if (aType == "network") {
request.onsuccess = function(aEvent) {
var cursor = aEvent.target.result;
if (cursor) {
if (DEBUG) {
debug("Get " + JSON.stringify(cursor.value));
}
// Covert timestamp to current timezone.
statsData.push({
timestamp: cursor.value.timestamp + offset,
receivedBytes: cursor.value.receivedBytes,
sentBytes: cursor.value.sentBytes
});
cursor.continue();
return;
}
aTxn.result.statsData = statsData;
};
}
}, aResultCb);
},
// Delete the stats of a specific app/service (within a specified time range).
clearStats: function(aType, aAppId, aServiceType, aComponent,
aStart, aEnd, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.clearStats()");
}
let offset = (new Date()).getTimezoneOffset() * 60 * 1000;
// Get store name.
let storeName = statsStoreNames[aType];
// Normalize start and end time to SAMPLE_RATE precission.
let start = this._normalizeTime(aStart, offset);
let end = this._normalizeTime(aEnd, offset);
if (DEBUG) {
debug("Query time range: " + start + " to " + end);
debug("[appId, serviceType, component] = [" + aAppId + ", " + aServiceType
+ ", " + aComponent + "]");
}
// Create filters.
let lowerFilter = [aAppId, aServiceType, aComponent, start];
let upperFilter = [aAppId, aServiceType, aComponent, end];
// Execute clear operation.
this._dbNewTxn(storeName, "readwrite", function(aTxn, aStore) {
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
let request = aStore.openCursor(range).onsuccess = function(aEvent) {
let cursor = aEvent.target.result;
if (cursor) {
if (DEBUG) {
debug("Delete " + JSON.stringify(cursor.value) + " from database");
}
cursor.delete();
cursor.continue();
return;
}
};
}, aResultCb);
},
// Delete all stats saved in a store.
clearAllStats: function(aType, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.clearAllStats()");
}
let storeName = statsStoreNames[aType];
// Execute clear operation.
this._dbNewTxn(storeName, "readwrite", function(aTxn, aStore) {
if (DEBUG) {
debug("Clear " + aType + " stats from datastore");
}
aStore.clear();
}, aResultCb);
},
addAlarm: function(aAlarm, aResultCb) {
if (DEBUG) {
debug(aAlarm.type + "Mgr.addAlarm()");
debug("alarm = " + JSON.stringify(aAlarm));
}
this._dbNewTxn(ALARM_STORE, "readwrite", function(aTxn, aStore) {
aStore.put(aAlarm).onsuccess = function setResult(aEvent) {
// Get alarmId.
aTxn.result = aEvent.target.result;
if (DEBUG) {
debug("New alarm ID: " + aTxn.result);
}
};
}, aResultCb);
},
// Convert DB record to alarm object.
_recordToAlarm: function(aRecord) {
let alarm = {
alarmId: aRecord.alarmId,
type: aRecord.type,
component: aRecord.component,
serviceType: aRecord.serviceType,
manifestURL: aRecord.manifestURL,
threshold: aRecord.threshold,
data: aRecord.data
};
return alarm;
},
getAlarms: function(aType, aOptions, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.getAlarms()");
debug("[appId, serviceType, component] = [" + aOptions.appId + ", "
+ aOptions.serviceType + ", " + aOptions.component + "]");
}
// Execute clear operation.
this._dbNewTxn(ALARM_STORE, "readwrite", function(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = [];
}
let indexName = null;
let range = null;
if (aOptions) { // Get alarms associated to specified statsOptions.
indexName = "controlTarget";
range = IDBKeyRange.only([aType, aOptions.manifestURL,
aOptions.serviceType, aOptions.component]);
} else { // Get all alarms of the specified type.
indexName = "type";
range = IDBKeyRange.only(aType);
}
let request = aStore.index(indexName).openCursor(range);
request.onsuccess = function onsuccess(aEvent) {
let cursor = aEvent.target.result;
if (cursor) {
aTxn.result.push(this._recordToAlarm(cursor.value));
cursor.continue();
return;
}
}.bind(this);
}.bind(this), aResultCb);
},
removeAlarm: function(aType, aAlarmId, aResultCb) {
if (DEBUG) {
debug("removeAlarms(" + aAlarmId + ")");
}
// Execute clear operation.
this._dbNewTxn(ALARM_STORE, "readwrite", function(aTxn, aStore) {
aStore.get(aAlarmId).onsuccess = function onsuccess(aEvent) {
let alarm = aEvent.target.result;
aTxn.result = false;
if (!alarm || aType !== alarm.type) {
return;
}
if (DEBUG) {
debug("Remove alarm " + JSON.stringify(alarm) + " from datastore");
}
aStore.delete(aAlarmId);
aTxn.result = true;
};
}, aResultCb);
},
removeAllAlarms: function(aType, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.removeAllAlarms()");
}
// Execute clear operation.
this._dbNewTxn(ALARM_STORE, "readwrite", function(aTxn, aStore) {
if (DEBUG) {
debug("Remove all " + aType + " alarms from datastore.");
}
let range = IDBKeyRange.only(aType);
let request = aStore.index("type").openCursor(range);
request.onsuccess = function onsuccess(aEvent) {
let cursor = aEvent.target.result;
if (cursor) {
if (DEBUG) {
debug("Remove " + JSON.stringify(cursor.value) + " from database.");
}
cursor.delete();
cursor.continue();
return;
}
};
}, aResultCb);
},
// Get all index keys of the component.
getComponents: function(aType, aResultCb) {
if (DEBUG) {
debug(aType + "Mgr.getComponents()");
}
let storeName = statsStoreNames[aType];
this._dbNewTxn(storeName, "readonly", function(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = [];
}
let request = aStore.index("component").openKeyCursor(null, "nextunique");
request.onsuccess = function onsuccess(aEvent) {
let cursor = aEvent.target.result;
if (cursor) {
aTxn.result.push(cursor.key);
cursor.continue();
return;
}
// Remove "" from the result, which indicates sum of all
// components' stats.
let index = aTxn.result.indexOf("");
if (index > -1) {
aTxn.result.splice(index, 1);
}
};
}, aResultCb);
},
get sampleRate () {
return SAMPLE_RATE;
},
get maxStorageAge() {
return MAX_STORAGE_AGE;
},
};