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/**
* Overrides the database name of each accessed database ("config", "admin", "local" excluded) to
* have the prefix TestData.dbPrefix so that the accessed data will be migrated by the background
* tenant migrations run by the ContinuousTenantMigration hook.
*/
(function() {
'use strict';
load("jstests/libs/override_methods/override_helpers.js"); // For 'OverrideHelpers'.
load("jstests/libs/transactions_util.js");
// Save references to the original methods in the IIFE's scope.
// This scoping allows the original methods to be called by the overrides below.
// Override this method to make the accessed database have the prefix TestData.dbPrefix.
let originalRunCommand = Mongo.prototype.runCommand;
const blacklistedDbNames = ["config", "admin", "local"];
function isBlacklistedDb(dbName) {
return blacklistedDbNames.includes(dbName);
}
/**
* If the database with the given name can be migrated, prepends TestData.dbPrefix to the name if
* it does not already start with the prefix.
*/
function prependDbPrefixToDbNameIfApplicable(dbName) {
if (dbName.length === 0) {
// There are input validation tests that use invalid database names, those should be
// ignored.
return dbName;
}
return isBlacklistedDb(dbName) ? dbName : TestData.dbPrefix + "_" + dbName;
}
/**
* If the database for the given namespace can be migrated, prepends TestData.dbPrefix to the
* namespace if it does not already start with the prefix.
*/
function prependDbPrefixToNsIfApplicable(ns) {
if (ns.length === 0 || !ns.includes(".")) {
// There are input validation tests that use invalid namespaces, those should be ignored.
return ns;
}
let splitNs = ns.split(".");
splitNs[0] = prependDbPrefixToDbNameIfApplicable(splitNs[0]);
return splitNs.join(".");
}
/**
* If the given database name starts TestData.dbPrefix, removes the prefix.
*/
function extractOriginalDbName(dbName) {
return dbName.replace(TestData.dbPrefix + "_", "");
}
/**
* If the database name for the given namespace starts TestData.dbPrefix, removes the prefix.
*/
function extractOriginalNs(ns) {
let splitNs = ns.split(".");
splitNs[0] = extractOriginalDbName(splitNs[0]);
return splitNs.join(".");
}
/**
* Removes all occurrences of TestDatabase.dbPrefix in the string.
*/
function removeDbPrefixFromString(string) {
return string.replace(new RegExp(TestData.dbPrefix + "_", "g"), "");
}
/**
* Prepends TestDatabase.dbPrefix to all the database name and namespace fields inside the given
* object.
*/
function prependDbPrefix(obj) {
for (let k of Object.keys(obj)) {
let v = obj[k];
if (typeof v === "string") {
if (k === "dbName" || k == "db") {
obj[k] = prependDbPrefixToDbNameIfApplicable(v);
} else if (k === "namespace" || k === "ns") {
obj[k] = prependDbPrefixToNsIfApplicable(v);
}
} else if (Array.isArray(v)) {
obj[k] = v.map((item) => {
return (typeof item === "object" && item !== null) ? prependDbPrefix(item) : item;
});
} else if (typeof v === "object" && v !== null && Object.keys(v).length > 0) {
obj[k] = prependDbPrefix(v);
}
}
return obj;
}
/**
* Removes TestDatabase.dbPrefix from all the database name and namespace fields inside the given
* object.
*/
function removeDbPrefix(obj) {
for (let k of Object.keys(obj)) {
let v = obj[k];
let originalK = removeDbPrefixFromString(k);
if (typeof v === "string") {
if (k === "dbName" || k == "db" || k == "dropped") {
obj[originalK] = extractOriginalDbName(v);
} else if (k === "namespace" || k === "ns") {
obj[originalK] = extractOriginalNs(v);
} else if (k === "errmsg" || k == "name") {
obj[originalK] = removeDbPrefixFromString(v);
}
} else if (Array.isArray(v)) {
obj[originalK] = v.map((item) => {
return (typeof item === "object" && item !== null) ? removeDbPrefix(item) : item;
});
} else if (typeof v === "object" && v !== null && Object.keys(v).length > 0) {
obj[originalK] = removeDbPrefix(v);
}
}
return obj;
}
const kCmdsWithNsAsFirstField =
new Set(["renameCollection", "checkShardingIndex", "dataSize", "datasize", "splitVector"]);
/**
* Returns a new cmdObj with TestData.dbPrefix prepended to all database name and namespace fields.
*/
function createCmdObjWithDbPrefix(cmdObj) {
const cmdName = Object.keys(cmdObj)[0];
let cmdObjWithDbPrefix = TransactionsUtil.deepCopyObject({}, cmdObj);
// Handle commands with special database and namespace field names.
if (kCmdsWithNsAsFirstField.has(cmdName)) {
cmdObjWithDbPrefix[cmdName] = prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix[cmdName]);
}
switch (cmdName) {
case "renameCollection":
cmdObjWithDbPrefix.to = prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix.to);
break;
case "internalRenameIfOptionsAndIndexesMatch":
cmdObjWithDbPrefix.from = prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix.from);
cmdObjWithDbPrefix.to = prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix.to);
break;
case "configureFailPoint":
if (cmdObjWithDbPrefix.data) {
if (cmdObjWithDbPrefix.data.namespace) {
cmdObjWithDbPrefix.data.namespace =
prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix.data.namespace);
} else if (cmdObjWithDbPrefix.data.ns) {
cmdObjWithDbPrefix.data.ns =
prependDbPrefixToNsIfApplicable(cmdObjWithDbPrefix.data.ns);
}
}
break;
case "applyOps":
for (let op of cmdObjWithDbPrefix.applyOps) {
if (typeof op.ns === "string" && op.ns.endsWith("system.views") && op.o._id &&
typeof op.o._id === "string") {
// For views, op.ns and op.o._id must be equal.
op.o._id = prependDbPrefixToNsIfApplicable(op.o._id);
}
}
break;
default:
break;
}
// Recursively override the database name and namespace fields. Exclude 'configureFailPoint'
// since data.errorExtraInfo.namespace or data.errorExtraInfo.ns can sometimes refer to
// collection name instead of namespace.
if (cmdName != "configureFailPoint") {
prependDbPrefix(cmdObjWithDbPrefix);
}
return cmdObjWithDbPrefix;
}
Mongo.prototype.runCommand = function(dbName, cmdObj, options) {
// Create another cmdObj from this command with TestData.dbPrefix prepended to all the
// applicable database names and namespaces.
const cmdObjWithDbPrefix = createCmdObjWithDbPrefix(cmdObj);
let numAttempts = 0;
while (true) {
numAttempts++;
let resObj = originalRunCommand.apply(
this, [prependDbPrefixToDbNameIfApplicable(dbName), cmdObjWithDbPrefix, options]);
// Remove TestData.dbPrefix from all database names and namespaces in the resObj since tests
// assume the command was run against the original database.
removeDbPrefix(resObj);
if (resObj.code != ErrorCodes.TenantMigrationAborted) {
return resObj;
}
jsTest.log("Got TenantMigrationAborted after trying " + numAttempts +
" times, retrying command " + tojson(cmdObj));
}
};
Mongo.prototype.runCommandWithMetadata = function(dbName, metadata, commandArgs) {
// Create another cmdObj from this command with TestData.dbPrefix prepended to all the
// applicable database names and namespaces.
const commandArgsWithDbPrefix = createCmdObjWithDbPrefix(commandArgs);
let numAttempts = 0;
while (true) {
numAttempts++;
let resObj = originalRunCommand.apply(
this, [prependDbPrefixToDbNameIfApplicable(dbName), metadata, commandArgsWithDbPrefix]);
// Remove TestData.dbPrefix from all database names and namespaces in the resObj since tests
// assume the command was run against the original database.
removeDbPrefix(resObj);
if (resObj.code != ErrorCodes.TenantMigrationAborted) {
return resObj;
}
jsTest.log("Got TenantMigrationAborted after trying " + numAttempts +
" times, retrying command " + tojson(commandArgs));
}
};
OverrideHelpers.prependOverrideInParallelShell(
"jstests/libs/override_methods/inject_tenant_prefix.js");
}());
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