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Merged
rafal-hawrylak merged 2 commits into from
May 20, 2026
Merged

JiT Worker in CLI and RPC infrastructure #2109

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8c73246
feat: implement JiT worker and RPC infrastructure
rafal-hawrylak Mar 9, 2026
271e6e6
Merge branch 'main' into cli_jit_workers
apilaskowski May 8, 2026
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6 changes: 4 additions & 2 deletions cli/api/BUILD
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Original file line numberDiff line numberDiff line change
Expand Up@@ -58,7 +58,8 @@ node_modules(
ts_test_suite(
name = "tests",
srcs = [
"utils_test.ts",
"commands/jit/rpc_test.ts",
"dbadapters/bigquery_test.ts",
],
data = [
":node_modules",
Expand All@@ -68,10 +69,11 @@ ts_test_suite(
"@nodejs//:npm",
],
deps = [
"//cli/api",
":api",
"//core",
"//protos:ts",
"//testing",
"@npm//@google-cloud/bigquery",
"@npm//@types/chai",
"@npm//@types/fs-extra",
"@npm//@types/js-yaml",
Expand Down
70 changes: 70 additions & 0 deletions cli/api/commands/base_worker.ts
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@@ -0,0 +1,70 @@
import { ChildProcess, fork } from "child_process";
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export abstract class BaseWorker<TResponse, TMessage = any> {
protected constructor(private readonly loaderPath: string) {}

protected async runWorker(
timeoutMillis: number,
onBoot: (child: ChildProcess) => void,
onMessage: (message: TMessage, child: ChildProcess, resolve: (res: TResponse) => void, reject: (err: Error) => void) => void
): Promise<TResponse> {
const forkScript = this.resolveScript();
const child = fork(forkScript, [], {
stdio: [0, 1, 2, "ipc", "pipe"]
});

return new Promise((resolve, reject) => {
let completed = false;

const terminate = (fn: () => void) => {
if (completed) {
return;
}
completed = true;
clearTimeout(timeout);
child.kill();
fn();
};

const timeout = setTimeout(() => {
terminate(() =>
reject(new Error(`Worker timed out after ${timeoutMillis / 1000} seconds`))
);
}, timeoutMillis);

child.on("message", (message: any) => {
if (message.type === "worker_booted") {
onBoot(child);
return;
}
onMessage(message, child, (res) => terminate(() => resolve(res)), (err) => terminate(() => reject(err)));
});

child.on("error", err => {
terminate(() => reject(err));
});

child.on("exit", (code, signal) => {
if (!completed) {
const errorMsg =
code !== 0 && code !== null
? `Worker exited with code ${code} and signal ${signal}`
: "Worker exited without sending a response message";
terminate(() => reject(new Error(errorMsg)));
}
});
});
}

private resolveScript() {
const pathsToTry = [this.loaderPath, "./worker_bundle.js"];
for (const p of pathsToTry) {
try {
return require.resolve(p);
} catch (e) {
// Continue to next path.
}
}
throw new Error(`Could not resolve worker script. Tried: ${pathsToTry.join(", ")}`);
}
}
103 changes: 103 additions & 0 deletions cli/api/commands/jit/compiler.ts
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@@ -0,0 +1,103 @@
import { ChildProcess } from "child_process";
import * as path from "path";

import { BaseWorker } from "df/cli/api/commands/base_worker";
import { handleDbRequest } from "df/cli/api/commands/jit/rpc";
import { IDbAdapter, IDbClient } from "df/cli/api/dbadapters";
import { IBigQueryExecutionOptions } from "df/cli/api/dbadapters/bigquery";
import { DEFAULT_COMPILATION_TIMEOUT_MILLIS } from "df/cli/api/utils/constants";
import { dataform } from "df/protos/ts";

export interface IJitWorkerMessage {
type: "rpc_request" | "jit_response" | "jit_error";
method?: string;
request?: Uint8Array;
correlationId?: string;
response?: Uint8Array;
error?: string;
}

export class JitCompileChildProcess extends BaseWorker<
dataform.IJitCompilationResponse,
IJitWorkerMessage
> {
public static async compile(
request: dataform.IJitCompilationRequest,
projectDir: string,
dbadapter: IDbAdapter,
dbclient: IDbClient,
timeoutMillis: number = DEFAULT_COMPILATION_TIMEOUT_MILLIS,
options?: IBigQueryExecutionOptions
): Promise<dataform.IJitCompilationResponse> {
return await new JitCompileChildProcess().run(
request,
projectDir,
dbadapter,
dbclient,
timeoutMillis,
options
);
}

constructor() {
super(path.resolve(__dirname, "../../../vm/jit_loader"));
}

private async run(
request: dataform.IJitCompilationRequest,
projectDir: string,
dbadapter: IDbAdapter,
dbclient: IDbClient,
timeoutMillis: number,
options?: IBigQueryExecutionOptions
): Promise<dataform.IJitCompilationResponse> {
return await this.runWorker(
timeoutMillis,
child => {
child.send({
type: "jit_compile",
request,
projectDir
});
},
async (message, child, resolve, reject) => {
if (message.type === "rpc_request") {
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await this.handleRpcRequest(message, child, dbadapter, dbclient, options);
} else if (message.type === "jit_response") {
resolve(dataform.JitCompilationResponse.fromObject(message.response));
} else if (message.type === "jit_error") {
reject(new Error(message.error));
}
}
);
}

private async handleRpcRequest(
message: IJitWorkerMessage,
child: ChildProcess,
dbadapter: IDbAdapter,
dbclient: IDbClient,
options?: IBigQueryExecutionOptions
) {
try {
const response = await handleDbRequest(
dbadapter,
dbclient,
message.method,
message.request,
options
);
child.send({
type: "rpc_response",
correlationId: message.correlationId,
response
});
} catch (e) {
child.send({
type: "rpc_response",
correlationId: message.correlationId,
error: e.message
});
}
}
}
92 changes: 92 additions & 0 deletions cli/api/commands/jit/rpc.ts
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@@ -0,0 +1,92 @@
import Long from "long";

import { IDbAdapter, IDbClient } from "df/cli/api/dbadapters";
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import { IBigQueryExecutionOptions } from "df/cli/api/dbadapters/bigquery";
import { Structs } from "df/common/protos/structs";
import { dataform, google } from "df/protos/ts";

export async function handleDbRequest(
dbadapter: IDbAdapter,
dbclient: IDbClient,
method: string,
request: Uint8Array,
options?: IBigQueryExecutionOptions
): Promise<Uint8Array> {
switch (method) {
case "Execute":
return await handleExecute(dbclient, request, options);
case "ListTables":
return await handleListTables(dbadapter, request);
case "GetTable":
return await handleGetTable(dbadapter, request);
case "DeleteTable":
return await handleDeleteTable(dbadapter, request, options?.dryRun);
default:
throw new Error(`Unrecognized RPC method: ${method}`);
}
}

async function handleExecute(
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dbclient: IDbClient,
request: Uint8Array,
options?: IBigQueryExecutionOptions
): Promise<Uint8Array> {
const executeRequest = dataform.ExecuteRequest.decode(request);
const executeRequestObj = dataform.ExecuteRequest.toObject(executeRequest, {
defaults: false
});
const requestOptions = executeRequestObj.bigQueryOptions;

const results = await dbclient.executeRaw(executeRequest.statement, {
rowLimit: executeRequest.rowLimit ? (executeRequest.rowLimit as Long).toNumber() : undefined,
params: Structs.toObject(executeRequest.params),
bigquery: {
...options,
...requestOptions,
labels: {
...options?.labels,
...requestOptions?.labels
},
jobPrefix: [options?.jobPrefix, requestOptions?.jobPrefix].filter(Boolean).join("-") || undefined
}
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});

return dataform.ExecuteResponse.encode({
rows: (results.rows || []).map(row => Structs.fromObject(row)),
schemaFields: results.schema || []
} as any).finish();
}

async function handleListTables(dbadapter: IDbAdapter, request: Uint8Array): Promise<Uint8Array> {
const listTablesRequest = dataform.ListTablesRequest.decode(request);
if (!listTablesRequest.database) {
throw new Error("ListTablesRequest.database must be supplied");
}
const tablesMetadata = await dbadapter.tables(listTablesRequest.database, listTablesRequest.schema);
const listTablesResponse = dataform.ListTablesResponse.create({
tables: tablesMetadata
});
return dataform.ListTablesResponse.encode(listTablesResponse).finish();
}

async function handleGetTable(dbadapter: IDbAdapter, request: Uint8Array): Promise<Uint8Array> {
const getTableRequest = dataform.GetTableRequest.decode(request);
const tableMetadata = await dbadapter.table(getTableRequest.target);
if (!tableMetadata) {
throw new Error(`Table not found: ${JSON.stringify(getTableRequest.target)}`);
}
return dataform.TableMetadata.encode(tableMetadata).finish();
}

async function handleDeleteTable(
dbadapter: IDbAdapter,
request: Uint8Array,
dryRun?: boolean
): Promise<Uint8Array> {
const deleteTableRequest = dataform.DeleteTableRequest.decode(request);
if (dryRun) {
return new Uint8Array();
}
await dbadapter.deleteTable(deleteTableRequest.target);
return new Uint8Array();
}
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