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/**
* Use prototype overrides to set read concern and write concern while running tests.
*/
(function() {
"use strict";
load("jstests/libs/override_methods/override_helpers.js");
if (typeof TestData === "undefined" || !TestData.hasOwnProperty("defaultReadConcernLevel")) {
throw new Error(
"The readConcern level to use must be set as the 'defaultReadConcernLevel'" +
" property on the global TestData object");
}
const kDefaultReadConcern = {
level: TestData.defaultReadConcernLevel
};
const kDefaultWriteConcern =
(TestData.hasOwnProperty("defaultWriteConcern")) ? TestData.defaultWriteConcern : {
w: "majority",
// Use a "signature" value that won't typically match a value assigned in normal use.
// This way the wtimeout set by this override is distinguishable in the server logs.
wtimeout: 5 * 60 * 1000 + 321, // 300321ms
};
const kCommandsSupportingReadConcern = new Set([
"aggregate",
"count",
"distinct",
"find",
"geoNear",
"geoSearch",
"group",
"parallelCollectionScan",
]);
const kCommandsSupportingWriteConcern = new Set([
"applyOps",
"authSchemaUpgrade",
"createRole",
"createUser",
"delete",
"dropAllRolesFromDatabase",
"dropAllUsersFromDatabase",
"dropRole",
"dropUser",
"findAndModify",
"findandmodify",
"grantPrivilegesToRole",
"grantRolesToRole",
"grantRolesToUser",
"insert",
"revokeRolesFromRole",
"revokeRolesFromUser",
"update",
"updateRole",
"updateUser",
]);
const kCommandsToEmulateWriteConcern = new Set([
"aggregate",
"appendOplogNote",
"captrunc",
"cleanupOrphaned",
"clone",
"cloneCollection",
"cloneCollectionAsCapped",
"convertToCapped",
"copydb",
"create",
"createIndexes",
"deleteIndexes",
"drop",
"dropDatabase",
"dropIndexes",
"emptycapped",
"godinsert",
"mapReduce",
"mapreduce",
"mapreduce.shardedfinish",
"moveChunk",
"renameCollection",
"revokePrivilegesFromRole",
]);
function runCommandWithReadAndWriteConcerns(
conn, dbName, commandName, commandObj, func, makeFuncArgs) {
if (typeof commandObj !== "object" || commandObj === null) {
return func.apply(conn, makeFuncArgs(commandObj));
}
// If the command is in a wrapped form, then we look for the actual command object inside
// the query/$query object.
var commandObjUnwrapped = commandObj;
if (commandName === "query" || commandName === "$query") {
commandObjUnwrapped = commandObj[commandName];
commandName = Object.keys(commandObjUnwrapped)[0];
}
if (commandName === "collMod" || commandName === "eval" || commandName === "$eval") {
throw new Error("Cowardly refusing to run test with overridden write concern when it" +
" uses a command that can only perform w=1 writes: " +
tojson(commandObj));
}
var shouldForceReadConcern = kCommandsSupportingReadConcern.has(commandName);
var shouldForceWriteConcern = kCommandsSupportingWriteConcern.has(commandName);
var shouldEmulateWriteConcern = kCommandsToEmulateWriteConcern.has(commandName);
if (commandName === "aggregate") {
if (OverrideHelpers.isAggregationWithOutStage(commandName, commandObjUnwrapped)) {
// The $out stage can only be used with readConcern={level: "local"}.
shouldForceReadConcern = false;
} else {
// Only a $out aggregation does writes.
shouldEmulateWriteConcern = false;
}
if (commandObjUnwrapped.explain) {
// Attempting to specify a readConcern while explaining an aggregation would always
// return an error prior to SERVER-30582 and it otherwise only compatible with
// readConcern={level: "local"}.
shouldForceReadConcern = false;
}
} else if (OverrideHelpers.isMapReduceWithInlineOutput(commandName, commandObjUnwrapped)) {
// A writeConcern can only be used with non-inline output.
shouldForceWriteConcern = false;
} else if (commandObj[commandName] === "system.profile") {
// Writes to the "system.profile" collection aren't guaranteed to be visible in the same
// majority-committed snapshot as the command they originated from. We don't override
// the readConcern for operations on the "system.profile" collection so that tests which
// assert on its contents continue to succeed.
shouldForceReadConcern = false;
}
const inWrappedForm = commandObj !== commandObjUnwrapped;
if (shouldForceReadConcern) {
// We create a copy of 'commandObj' to avoid mutating the parameter the caller
// specified.
commandObj = Object.assign({}, commandObj);
if (inWrappedForm) {
commandObjUnwrapped = Object.assign({}, commandObjUnwrapped);
commandObj[Object.keys(commandObj)[0]] = commandObjUnwrapped;
} else {
commandObjUnwrapped = commandObj;
}
if (commandObjUnwrapped.hasOwnProperty("readConcern")) {
var readConcern = commandObjUnwrapped.readConcern;
if (typeof readConcern !== "object" || readConcern === null ||
(readConcern.hasOwnProperty("level") &&
bsonWoCompare({_: readConcern.level}, {_: kDefaultReadConcern.level}) !== 0)) {
throw new Error("Cowardly refusing to override read concern of command: " +
tojson(commandObj));
}
// We create a copy of the readConcern object to avoid mutating the parameter the
// caller specified.
readConcern = Object.assign({}, readConcern, kDefaultReadConcern);
commandObjUnwrapped.readConcern = readConcern;
} else {
commandObjUnwrapped.readConcern = kDefaultReadConcern;
}
}
if (shouldForceWriteConcern) {
// We create a copy of 'commandObj' to avoid mutating the parameter the caller
// specified.
commandObj = Object.assign({}, commandObj);
if (inWrappedForm) {
commandObjUnwrapped = Object.assign({}, commandObjUnwrapped);
commandObj[Object.keys(commandObj)[0]] = commandObjUnwrapped;
} else {
commandObjUnwrapped = commandObj;
}
if (commandObjUnwrapped.hasOwnProperty("writeConcern")) {
var writeConcern = commandObjUnwrapped.writeConcern;
if (typeof writeConcern !== "object" || writeConcern === null ||
(writeConcern.hasOwnProperty("w") &&
bsonWoCompare({_: writeConcern.w}, {_: kDefaultWriteConcern.w}) !== 0)) {
throw new Error("Cowardly refusing to override write concern of command: " +
tojson(commandObj));
}
// We create a copy of the writeConcern object to avoid mutating the parameter the
// caller specified.
writeConcern = Object.assign({}, writeConcern, kDefaultWriteConcern);
commandObjUnwrapped.writeConcern = writeConcern;
} else {
commandObjUnwrapped.writeConcern = kDefaultWriteConcern;
}
}
const serverResponse = func.apply(conn, makeFuncArgs(commandObj));
if (shouldEmulateWriteConcern && serverResponse.ok === 1) {
// We only wait for the write concern if the command succeeded to match what the
// server's behavior would have been if the command supports the "writeConcern" option
// itself.
assert.commandWorked(
conn.runCommand(dbName, Object.assign({getLastError: 1}, kDefaultWriteConcern), 0));
}
return serverResponse;
}
OverrideHelpers.prependOverrideInParallelShell(
"jstests/libs/override_methods/set_read_and_write_concerns.js");
OverrideHelpers.overrideRunCommand(runCommandWithReadAndWriteConcerns);
})();
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