You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
591 lines
24 KiB
591 lines
24 KiB
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.ConnectionPool = exports.PoolState = void 0;
|
|
const timers_1 = require("timers");
|
|
const constants_1 = require("../constants");
|
|
const error_1 = require("../error");
|
|
const mongo_types_1 = require("../mongo_types");
|
|
const utils_1 = require("../utils");
|
|
const connect_1 = require("./connect");
|
|
const connection_1 = require("./connection");
|
|
const connection_pool_events_1 = require("./connection_pool_events");
|
|
const errors_1 = require("./errors");
|
|
const metrics_1 = require("./metrics");
|
|
/** @internal */
|
|
const kServer = Symbol('server');
|
|
/** @internal */
|
|
const kConnections = Symbol('connections');
|
|
/** @internal */
|
|
const kPending = Symbol('pending');
|
|
/** @internal */
|
|
const kCheckedOut = Symbol('checkedOut');
|
|
/** @internal */
|
|
const kMinPoolSizeTimer = Symbol('minPoolSizeTimer');
|
|
/** @internal */
|
|
const kGeneration = Symbol('generation');
|
|
/** @internal */
|
|
const kServiceGenerations = Symbol('serviceGenerations');
|
|
/** @internal */
|
|
const kConnectionCounter = Symbol('connectionCounter');
|
|
/** @internal */
|
|
const kCancellationToken = Symbol('cancellationToken');
|
|
/** @internal */
|
|
const kWaitQueue = Symbol('waitQueue');
|
|
/** @internal */
|
|
const kCancelled = Symbol('cancelled');
|
|
/** @internal */
|
|
const kMetrics = Symbol('metrics');
|
|
/** @internal */
|
|
const kProcessingWaitQueue = Symbol('processingWaitQueue');
|
|
/** @internal */
|
|
const kPoolState = Symbol('poolState');
|
|
/** @internal */
|
|
exports.PoolState = Object.freeze({
|
|
paused: 'paused',
|
|
ready: 'ready',
|
|
closed: 'closed'
|
|
});
|
|
/**
|
|
* A pool of connections which dynamically resizes, and emit events related to pool activity
|
|
* @internal
|
|
*/
|
|
class ConnectionPool extends mongo_types_1.TypedEventEmitter {
|
|
constructor(server, options) {
|
|
super();
|
|
this.options = Object.freeze({
|
|
...options,
|
|
connectionType: connection_1.Connection,
|
|
maxPoolSize: options.maxPoolSize ?? 100,
|
|
minPoolSize: options.minPoolSize ?? 0,
|
|
maxConnecting: options.maxConnecting ?? 2,
|
|
maxIdleTimeMS: options.maxIdleTimeMS ?? 0,
|
|
waitQueueTimeoutMS: options.waitQueueTimeoutMS ?? 0,
|
|
minPoolSizeCheckFrequencyMS: options.minPoolSizeCheckFrequencyMS ?? 100,
|
|
autoEncrypter: options.autoEncrypter,
|
|
metadata: options.metadata
|
|
});
|
|
if (this.options.minPoolSize > this.options.maxPoolSize) {
|
|
throw new error_1.MongoInvalidArgumentError('Connection pool minimum size must not be greater than maximum pool size');
|
|
}
|
|
this[kPoolState] = exports.PoolState.paused;
|
|
this[kServer] = server;
|
|
this[kConnections] = new utils_1.List();
|
|
this[kPending] = 0;
|
|
this[kCheckedOut] = new Set();
|
|
this[kMinPoolSizeTimer] = undefined;
|
|
this[kGeneration] = 0;
|
|
this[kServiceGenerations] = new Map();
|
|
this[kConnectionCounter] = (0, utils_1.makeCounter)(1);
|
|
this[kCancellationToken] = new mongo_types_1.CancellationToken();
|
|
this[kCancellationToken].setMaxListeners(Infinity);
|
|
this[kWaitQueue] = new utils_1.List();
|
|
this[kMetrics] = new metrics_1.ConnectionPoolMetrics();
|
|
this[kProcessingWaitQueue] = false;
|
|
process.nextTick(() => {
|
|
this.emit(ConnectionPool.CONNECTION_POOL_CREATED, new connection_pool_events_1.ConnectionPoolCreatedEvent(this));
|
|
});
|
|
}
|
|
/** The address of the endpoint the pool is connected to */
|
|
get address() {
|
|
return this.options.hostAddress.toString();
|
|
}
|
|
/**
|
|
* Check if the pool has been closed
|
|
*
|
|
* TODO(NODE-3263): We can remove this property once shell no longer needs it
|
|
*/
|
|
get closed() {
|
|
return this[kPoolState] === exports.PoolState.closed;
|
|
}
|
|
/** An integer representing the SDAM generation of the pool */
|
|
get generation() {
|
|
return this[kGeneration];
|
|
}
|
|
/** An integer expressing how many total connections (available + pending + in use) the pool currently has */
|
|
get totalConnectionCount() {
|
|
return (this.availableConnectionCount + this.pendingConnectionCount + this.currentCheckedOutCount);
|
|
}
|
|
/** An integer expressing how many connections are currently available in the pool. */
|
|
get availableConnectionCount() {
|
|
return this[kConnections].length;
|
|
}
|
|
get pendingConnectionCount() {
|
|
return this[kPending];
|
|
}
|
|
get currentCheckedOutCount() {
|
|
return this[kCheckedOut].size;
|
|
}
|
|
get waitQueueSize() {
|
|
return this[kWaitQueue].length;
|
|
}
|
|
get loadBalanced() {
|
|
return this.options.loadBalanced;
|
|
}
|
|
get serviceGenerations() {
|
|
return this[kServiceGenerations];
|
|
}
|
|
get serverError() {
|
|
return this[kServer].description.error;
|
|
}
|
|
/**
|
|
* This is exposed ONLY for use in mongosh, to enable
|
|
* killing all connections if a user quits the shell with
|
|
* operations in progress.
|
|
*
|
|
* This property may be removed as a part of NODE-3263.
|
|
*/
|
|
get checkedOutConnections() {
|
|
return this[kCheckedOut];
|
|
}
|
|
/**
|
|
* Get the metrics information for the pool when a wait queue timeout occurs.
|
|
*/
|
|
waitQueueErrorMetrics() {
|
|
return this[kMetrics].info(this.options.maxPoolSize);
|
|
}
|
|
/**
|
|
* Set the pool state to "ready"
|
|
*/
|
|
ready() {
|
|
if (this[kPoolState] !== exports.PoolState.paused) {
|
|
return;
|
|
}
|
|
this[kPoolState] = exports.PoolState.ready;
|
|
this.emit(ConnectionPool.CONNECTION_POOL_READY, new connection_pool_events_1.ConnectionPoolReadyEvent(this));
|
|
(0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
|
|
this.ensureMinPoolSize();
|
|
}
|
|
/**
|
|
* Check a connection out of this pool. The connection will continue to be tracked, but no reference to it
|
|
* will be held by the pool. This means that if a connection is checked out it MUST be checked back in or
|
|
* explicitly destroyed by the new owner.
|
|
*/
|
|
checkOut(callback) {
|
|
this.emit(ConnectionPool.CONNECTION_CHECK_OUT_STARTED, new connection_pool_events_1.ConnectionCheckOutStartedEvent(this));
|
|
const waitQueueMember = { callback };
|
|
const waitQueueTimeoutMS = this.options.waitQueueTimeoutMS;
|
|
if (waitQueueTimeoutMS) {
|
|
waitQueueMember.timer = (0, timers_1.setTimeout)(() => {
|
|
waitQueueMember[kCancelled] = true;
|
|
waitQueueMember.timer = undefined;
|
|
this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, 'timeout'));
|
|
waitQueueMember.callback(new errors_1.WaitQueueTimeoutError(this.loadBalanced
|
|
? this.waitQueueErrorMetrics()
|
|
: 'Timed out while checking out a connection from connection pool', this.address));
|
|
}, waitQueueTimeoutMS);
|
|
}
|
|
this[kWaitQueue].push(waitQueueMember);
|
|
process.nextTick(() => this.processWaitQueue());
|
|
}
|
|
/**
|
|
* Check a connection into the pool.
|
|
*
|
|
* @param connection - The connection to check in
|
|
*/
|
|
checkIn(connection) {
|
|
if (!this[kCheckedOut].has(connection)) {
|
|
return;
|
|
}
|
|
const poolClosed = this.closed;
|
|
const stale = this.connectionIsStale(connection);
|
|
const willDestroy = !!(poolClosed || stale || connection.closed);
|
|
if (!willDestroy) {
|
|
connection.markAvailable();
|
|
this[kConnections].unshift(connection);
|
|
}
|
|
this[kCheckedOut].delete(connection);
|
|
this.emit(ConnectionPool.CONNECTION_CHECKED_IN, new connection_pool_events_1.ConnectionCheckedInEvent(this, connection));
|
|
if (willDestroy) {
|
|
const reason = connection.closed ? 'error' : poolClosed ? 'poolClosed' : 'stale';
|
|
this.destroyConnection(connection, reason);
|
|
}
|
|
process.nextTick(() => this.processWaitQueue());
|
|
}
|
|
/**
|
|
* Clear the pool
|
|
*
|
|
* Pool reset is handled by incrementing the pool's generation count. Any existing connection of a
|
|
* previous generation will eventually be pruned during subsequent checkouts.
|
|
*/
|
|
clear(options = {}) {
|
|
if (this.closed) {
|
|
return;
|
|
}
|
|
// handle load balanced case
|
|
if (this.loadBalanced) {
|
|
const { serviceId } = options;
|
|
if (!serviceId) {
|
|
throw new error_1.MongoRuntimeError('ConnectionPool.clear() called in load balanced mode with no serviceId.');
|
|
}
|
|
const sid = serviceId.toHexString();
|
|
const generation = this.serviceGenerations.get(sid);
|
|
// Only need to worry if the generation exists, since it should
|
|
// always be there but typescript needs the check.
|
|
if (generation == null) {
|
|
throw new error_1.MongoRuntimeError('Service generations are required in load balancer mode.');
|
|
}
|
|
else {
|
|
// Increment the generation for the service id.
|
|
this.serviceGenerations.set(sid, generation + 1);
|
|
}
|
|
this.emit(ConnectionPool.CONNECTION_POOL_CLEARED, new connection_pool_events_1.ConnectionPoolClearedEvent(this, { serviceId }));
|
|
return;
|
|
}
|
|
// handle non load-balanced case
|
|
const interruptInUseConnections = options.interruptInUseConnections ?? false;
|
|
const oldGeneration = this[kGeneration];
|
|
this[kGeneration] += 1;
|
|
const alreadyPaused = this[kPoolState] === exports.PoolState.paused;
|
|
this[kPoolState] = exports.PoolState.paused;
|
|
this.clearMinPoolSizeTimer();
|
|
if (!alreadyPaused) {
|
|
this.emit(ConnectionPool.CONNECTION_POOL_CLEARED, new connection_pool_events_1.ConnectionPoolClearedEvent(this, { interruptInUseConnections }));
|
|
}
|
|
if (interruptInUseConnections) {
|
|
process.nextTick(() => this.interruptInUseConnections(oldGeneration));
|
|
}
|
|
this.processWaitQueue();
|
|
}
|
|
/**
|
|
* Closes all stale in-use connections in the pool with a resumable PoolClearedOnNetworkError.
|
|
*
|
|
* Only connections where `connection.generation <= minGeneration` are killed.
|
|
*/
|
|
interruptInUseConnections(minGeneration) {
|
|
for (const connection of this[kCheckedOut]) {
|
|
if (connection.generation <= minGeneration) {
|
|
this.checkIn(connection);
|
|
connection.onError(new errors_1.PoolClearedOnNetworkError(this));
|
|
}
|
|
}
|
|
}
|
|
close(_options, _cb) {
|
|
let options = _options;
|
|
const callback = (_cb ?? _options);
|
|
if (typeof options === 'function') {
|
|
options = {};
|
|
}
|
|
options = Object.assign({ force: false }, options);
|
|
if (this.closed) {
|
|
return callback();
|
|
}
|
|
// immediately cancel any in-flight connections
|
|
this[kCancellationToken].emit('cancel');
|
|
// end the connection counter
|
|
if (typeof this[kConnectionCounter].return === 'function') {
|
|
this[kConnectionCounter].return(undefined);
|
|
}
|
|
this[kPoolState] = exports.PoolState.closed;
|
|
this.clearMinPoolSizeTimer();
|
|
this.processWaitQueue();
|
|
(0, utils_1.eachAsync)(this[kConnections].toArray(), (conn, cb) => {
|
|
this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, conn, 'poolClosed'));
|
|
conn.destroy(options, cb);
|
|
}, err => {
|
|
this[kConnections].clear();
|
|
this.emit(ConnectionPool.CONNECTION_POOL_CLOSED, new connection_pool_events_1.ConnectionPoolClosedEvent(this));
|
|
callback(err);
|
|
});
|
|
}
|
|
/**
|
|
* Runs a lambda with an implicitly checked out connection, checking that connection back in when the lambda
|
|
* has completed by calling back.
|
|
*
|
|
* NOTE: please note the required signature of `fn`
|
|
*
|
|
* @remarks When in load balancer mode, connections can be pinned to cursors or transactions.
|
|
* In these cases we pass the connection in to this method to ensure it is used and a new
|
|
* connection is not checked out.
|
|
*
|
|
* @param conn - A pinned connection for use in load balancing mode.
|
|
* @param fn - A function which operates on a managed connection
|
|
* @param callback - The original callback
|
|
*/
|
|
withConnection(conn, fn, callback) {
|
|
if (conn) {
|
|
// use the provided connection, and do _not_ check it in after execution
|
|
fn(undefined, conn, (fnErr, result) => {
|
|
if (typeof callback === 'function') {
|
|
if (fnErr) {
|
|
callback(fnErr);
|
|
}
|
|
else {
|
|
callback(undefined, result);
|
|
}
|
|
}
|
|
});
|
|
return;
|
|
}
|
|
this.checkOut((err, conn) => {
|
|
// don't callback with `err` here, we might want to act upon it inside `fn`
|
|
fn(err, conn, (fnErr, result) => {
|
|
if (typeof callback === 'function') {
|
|
if (fnErr) {
|
|
callback(fnErr);
|
|
}
|
|
else {
|
|
callback(undefined, result);
|
|
}
|
|
}
|
|
if (conn) {
|
|
this.checkIn(conn);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
/** Clear the min pool size timer */
|
|
clearMinPoolSizeTimer() {
|
|
const minPoolSizeTimer = this[kMinPoolSizeTimer];
|
|
if (minPoolSizeTimer) {
|
|
(0, timers_1.clearTimeout)(minPoolSizeTimer);
|
|
}
|
|
}
|
|
destroyConnection(connection, reason) {
|
|
this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, connection, reason));
|
|
// destroy the connection
|
|
process.nextTick(() => connection.destroy());
|
|
}
|
|
connectionIsStale(connection) {
|
|
const serviceId = connection.serviceId;
|
|
if (this.loadBalanced && serviceId) {
|
|
const sid = serviceId.toHexString();
|
|
const generation = this.serviceGenerations.get(sid);
|
|
return connection.generation !== generation;
|
|
}
|
|
return connection.generation !== this[kGeneration];
|
|
}
|
|
connectionIsIdle(connection) {
|
|
return !!(this.options.maxIdleTimeMS && connection.idleTime > this.options.maxIdleTimeMS);
|
|
}
|
|
/**
|
|
* Destroys a connection if the connection is perished.
|
|
*
|
|
* @returns `true` if the connection was destroyed, `false` otherwise.
|
|
*/
|
|
destroyConnectionIfPerished(connection) {
|
|
const isStale = this.connectionIsStale(connection);
|
|
const isIdle = this.connectionIsIdle(connection);
|
|
if (!isStale && !isIdle && !connection.closed) {
|
|
return false;
|
|
}
|
|
const reason = connection.closed ? 'error' : isStale ? 'stale' : 'idle';
|
|
this.destroyConnection(connection, reason);
|
|
return true;
|
|
}
|
|
createConnection(callback) {
|
|
const connectOptions = {
|
|
...this.options,
|
|
id: this[kConnectionCounter].next().value,
|
|
generation: this[kGeneration],
|
|
cancellationToken: this[kCancellationToken]
|
|
};
|
|
this[kPending]++;
|
|
// This is our version of a "virtual" no-I/O connection as the spec requires
|
|
this.emit(ConnectionPool.CONNECTION_CREATED, new connection_pool_events_1.ConnectionCreatedEvent(this, { id: connectOptions.id }));
|
|
(0, connect_1.connect)(connectOptions, (err, connection) => {
|
|
if (err || !connection) {
|
|
this[kPending]--;
|
|
this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, { id: connectOptions.id, serviceId: undefined }, 'error'));
|
|
if (err instanceof error_1.MongoNetworkError || err instanceof error_1.MongoServerError) {
|
|
err.connectionGeneration = connectOptions.generation;
|
|
}
|
|
callback(err ?? new error_1.MongoRuntimeError('Connection creation failed without error'));
|
|
return;
|
|
}
|
|
// The pool might have closed since we started trying to create a connection
|
|
if (this[kPoolState] !== exports.PoolState.ready) {
|
|
this[kPending]--;
|
|
connection.destroy({ force: true });
|
|
callback(this.closed ? new errors_1.PoolClosedError(this) : new errors_1.PoolClearedError(this));
|
|
return;
|
|
}
|
|
// forward all events from the connection to the pool
|
|
for (const event of [...constants_1.APM_EVENTS, connection_1.Connection.CLUSTER_TIME_RECEIVED]) {
|
|
connection.on(event, (e) => this.emit(event, e));
|
|
}
|
|
if (this.loadBalanced) {
|
|
connection.on(connection_1.Connection.PINNED, pinType => this[kMetrics].markPinned(pinType));
|
|
connection.on(connection_1.Connection.UNPINNED, pinType => this[kMetrics].markUnpinned(pinType));
|
|
const serviceId = connection.serviceId;
|
|
if (serviceId) {
|
|
let generation;
|
|
const sid = serviceId.toHexString();
|
|
if ((generation = this.serviceGenerations.get(sid))) {
|
|
connection.generation = generation;
|
|
}
|
|
else {
|
|
this.serviceGenerations.set(sid, 0);
|
|
connection.generation = 0;
|
|
}
|
|
}
|
|
}
|
|
connection.markAvailable();
|
|
this.emit(ConnectionPool.CONNECTION_READY, new connection_pool_events_1.ConnectionReadyEvent(this, connection));
|
|
this[kPending]--;
|
|
callback(undefined, connection);
|
|
return;
|
|
});
|
|
}
|
|
ensureMinPoolSize() {
|
|
const minPoolSize = this.options.minPoolSize;
|
|
if (this[kPoolState] !== exports.PoolState.ready || minPoolSize === 0) {
|
|
return;
|
|
}
|
|
this[kConnections].prune(connection => this.destroyConnectionIfPerished(connection));
|
|
if (this.totalConnectionCount < minPoolSize &&
|
|
this.pendingConnectionCount < this.options.maxConnecting) {
|
|
// NOTE: ensureMinPoolSize should not try to get all the pending
|
|
// connection permits because that potentially delays the availability of
|
|
// the connection to a checkout request
|
|
this.createConnection((err, connection) => {
|
|
if (err) {
|
|
this[kServer].handleError(err);
|
|
}
|
|
if (!err && connection) {
|
|
this[kConnections].push(connection);
|
|
process.nextTick(() => this.processWaitQueue());
|
|
}
|
|
if (this[kPoolState] === exports.PoolState.ready) {
|
|
(0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
|
|
this[kMinPoolSizeTimer] = (0, timers_1.setTimeout)(() => this.ensureMinPoolSize(), this.options.minPoolSizeCheckFrequencyMS);
|
|
}
|
|
});
|
|
}
|
|
else {
|
|
(0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
|
|
this[kMinPoolSizeTimer] = (0, timers_1.setTimeout)(() => this.ensureMinPoolSize(), this.options.minPoolSizeCheckFrequencyMS);
|
|
}
|
|
}
|
|
processWaitQueue() {
|
|
if (this[kProcessingWaitQueue]) {
|
|
return;
|
|
}
|
|
this[kProcessingWaitQueue] = true;
|
|
while (this.waitQueueSize) {
|
|
const waitQueueMember = this[kWaitQueue].first();
|
|
if (!waitQueueMember) {
|
|
this[kWaitQueue].shift();
|
|
continue;
|
|
}
|
|
if (waitQueueMember[kCancelled]) {
|
|
this[kWaitQueue].shift();
|
|
continue;
|
|
}
|
|
if (this[kPoolState] !== exports.PoolState.ready) {
|
|
const reason = this.closed ? 'poolClosed' : 'connectionError';
|
|
const error = this.closed ? new errors_1.PoolClosedError(this) : new errors_1.PoolClearedError(this);
|
|
this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, reason));
|
|
if (waitQueueMember.timer) {
|
|
(0, timers_1.clearTimeout)(waitQueueMember.timer);
|
|
}
|
|
this[kWaitQueue].shift();
|
|
waitQueueMember.callback(error);
|
|
continue;
|
|
}
|
|
if (!this.availableConnectionCount) {
|
|
break;
|
|
}
|
|
const connection = this[kConnections].shift();
|
|
if (!connection) {
|
|
break;
|
|
}
|
|
if (!this.destroyConnectionIfPerished(connection)) {
|
|
this[kCheckedOut].add(connection);
|
|
this.emit(ConnectionPool.CONNECTION_CHECKED_OUT, new connection_pool_events_1.ConnectionCheckedOutEvent(this, connection));
|
|
if (waitQueueMember.timer) {
|
|
(0, timers_1.clearTimeout)(waitQueueMember.timer);
|
|
}
|
|
this[kWaitQueue].shift();
|
|
waitQueueMember.callback(undefined, connection);
|
|
}
|
|
}
|
|
const { maxPoolSize, maxConnecting } = this.options;
|
|
while (this.waitQueueSize > 0 &&
|
|
this.pendingConnectionCount < maxConnecting &&
|
|
(maxPoolSize === 0 || this.totalConnectionCount < maxPoolSize)) {
|
|
const waitQueueMember = this[kWaitQueue].shift();
|
|
if (!waitQueueMember || waitQueueMember[kCancelled]) {
|
|
continue;
|
|
}
|
|
this.createConnection((err, connection) => {
|
|
if (waitQueueMember[kCancelled]) {
|
|
if (!err && connection) {
|
|
this[kConnections].push(connection);
|
|
}
|
|
}
|
|
else {
|
|
if (err) {
|
|
this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, 'connectionError'));
|
|
}
|
|
else if (connection) {
|
|
this[kCheckedOut].add(connection);
|
|
this.emit(ConnectionPool.CONNECTION_CHECKED_OUT, new connection_pool_events_1.ConnectionCheckedOutEvent(this, connection));
|
|
}
|
|
if (waitQueueMember.timer) {
|
|
(0, timers_1.clearTimeout)(waitQueueMember.timer);
|
|
}
|
|
waitQueueMember.callback(err, connection);
|
|
}
|
|
process.nextTick(() => this.processWaitQueue());
|
|
});
|
|
}
|
|
this[kProcessingWaitQueue] = false;
|
|
}
|
|
}
|
|
exports.ConnectionPool = ConnectionPool;
|
|
/**
|
|
* Emitted when the connection pool is created.
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_POOL_CREATED = constants_1.CONNECTION_POOL_CREATED;
|
|
/**
|
|
* Emitted once when the connection pool is closed
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_POOL_CLOSED = constants_1.CONNECTION_POOL_CLOSED;
|
|
/**
|
|
* Emitted each time the connection pool is cleared and it's generation incremented
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_POOL_CLEARED = constants_1.CONNECTION_POOL_CLEARED;
|
|
/**
|
|
* Emitted each time the connection pool is marked ready
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_POOL_READY = constants_1.CONNECTION_POOL_READY;
|
|
/**
|
|
* Emitted when a connection is created.
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CREATED = constants_1.CONNECTION_CREATED;
|
|
/**
|
|
* Emitted when a connection becomes established, and is ready to use
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_READY = constants_1.CONNECTION_READY;
|
|
/**
|
|
* Emitted when a connection is closed
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CLOSED = constants_1.CONNECTION_CLOSED;
|
|
/**
|
|
* Emitted when an attempt to check out a connection begins
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CHECK_OUT_STARTED = constants_1.CONNECTION_CHECK_OUT_STARTED;
|
|
/**
|
|
* Emitted when an attempt to check out a connection fails
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CHECK_OUT_FAILED = constants_1.CONNECTION_CHECK_OUT_FAILED;
|
|
/**
|
|
* Emitted each time a connection is successfully checked out of the connection pool
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CHECKED_OUT = constants_1.CONNECTION_CHECKED_OUT;
|
|
/**
|
|
* Emitted each time a connection is successfully checked into the connection pool
|
|
* @event
|
|
*/
|
|
ConnectionPool.CONNECTION_CHECKED_IN = constants_1.CONNECTION_CHECKED_IN;
|
|
//# sourceMappingURL=connection_pool.js.map
|