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// Copyright (C) 2019 The Android Open Source Project
//
// 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.
import {
AggregateData,
Column,
ColumnDef,
ThreadStateExtra,
} from '../../common/aggregation_data';
import {Engine} from '../../common/engine';
import {slowlyCountRows} from '../../common/query_iterator';
import {Area, Sorting} from '../../common/state';
import {Controller} from '../controller';
import {globals} from '../globals';
export interface AggregationControllerArgs {
engine: Engine;
kind: string;
}
export abstract class AggregationController extends Controller<'main'> {
readonly kind: string;
private previousArea?: Area;
private previousSorting?: Sorting;
private requestingData = false;
private queuedRequest = false;
abstract async createAggregateView(engine: Engine, area: Area):
Promise<boolean>;
abstract async getExtra(engine: Engine, area: Area):
Promise<ThreadStateExtra|void>;
abstract getTabName(): string;
abstract getDefaultSorting(): Sorting;
abstract getColumnDefinitions(): ColumnDef[];
constructor(private args: AggregationControllerArgs) {
super('main');
this.kind = this.args.kind;
}
run() {
const selection = globals.state.currentSelection;
if (selection === null || selection.kind !== 'AREA') {
globals.publish('AggregateData', {
data: {
tabName: this.getTabName(),
columns: [],
strings: [],
columnSums: [],
},
kind: this.args.kind
});
return;
}
const selectedArea = globals.state.areas[selection.areaId];
const aggregatePreferences =
globals.state.aggregatePreferences[this.args.kind];
const areaChanged = this.previousArea !== selectedArea;
const sortingChanged = aggregatePreferences &&
this.previousSorting !== aggregatePreferences.sorting;
if (!areaChanged && !sortingChanged) return;
if (this.requestingData) {
this.queuedRequest = true;
} else {
this.requestingData = true;
if (sortingChanged) this.previousSorting = aggregatePreferences.sorting;
if (areaChanged) this.previousArea = Object.assign({}, selectedArea);
this.getAggregateData(selectedArea, areaChanged)
.then(
data => globals.publish(
'AggregateData', {data, kind: this.args.kind}))
.finally(() => {
this.requestingData = false;
if (this.queuedRequest) {
this.queuedRequest = false;
this.run();
}
});
}
}
async getAggregateData(area: Area, areaChanged: boolean):
Promise<AggregateData> {
if (areaChanged) {
const viewExists = await this.createAggregateView(this.args.engine, area);
if (!viewExists) {
return {
tabName: this.getTabName(),
columns: [],
strings: [],
columnSums: [],
};
}
}
const defs = this.getColumnDefinitions();
const colIds = defs.map(col => col.columnId);
const pref = globals.state.aggregatePreferences[this.kind];
let sorting = `${this.getDefaultSorting().column} ${
this.getDefaultSorting().direction}`;
if (pref && pref.sorting) {
sorting = `${pref.sorting.column} ${pref.sorting.direction}`;
}
const query = `select ${colIds} from ${this.kind} order by ${sorting}`;
const result = await this.args.engine.query(query);
const numRows = slowlyCountRows(result);
const columns = defs.map(def => this.columnFromColumnDef(def, numRows));
const columnSums = await Promise.all(defs.map(def => this.getSum(def)));
const extraData = await this.getExtra(this.args.engine, area);
const extra = extraData ? extraData : undefined;
const data: AggregateData =
{tabName: this.getTabName(), columns, columnSums, strings: [], extra};
const stringIndexes = new Map<string, number>();
function internString(str: string) {
let idx = stringIndexes.get(str);
if (idx !== undefined) return idx;
idx = data.strings.length;
data.strings.push(str);
stringIndexes.set(str, idx);
return idx;
}
for (let row = 0; row < numRows; row++) {
const cols = result.columns;
for (let col = 0; col < result.columns.length; col++) {
if (cols[col].stringValues && cols[col].stringValues!.length > 0) {
data.columns[col].data[row] =
internString(cols[col].stringValues![row]);
} else if (cols[col].longValues && cols[col].longValues!.length > 0) {
data.columns[col].data[row] = cols[col].longValues![row];
} else if (
cols[col].doubleValues && cols[col].doubleValues!.length > 0) {
data.columns[col].data[row] = cols[col].doubleValues![row];
}
}
}
return data;
}
async getSum(def: ColumnDef): Promise<string> {
if (!def.sum) return '';
const result = await this.args.engine.queryOneRow(
`select sum(${def.columnId}) from ${this.kind}`);
let sum = result[0];
if (def.kind === 'TIMESTAMP_NS') {
sum = sum / 1e6;
}
return `${sum}`;
}
columnFromColumnDef(def: ColumnDef, numRows: number): Column {
// TODO(hjd): The Column type should be based on the
// ColumnDef type or vice versa to avoid this cast.
return {
title: def.title,
kind: def.kind,
data: new def.columnConstructor(numRows),
columnId: def.columnId,
} as Column;
}
}
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