1 files changed, 94 insertions, 0 deletions
diff --git a/lib/pool.js b/lib/pool.js
new file mode 100644
index 0000000..e3cd339
--- /dev/null
+++ b/lib/pool.js
@@ -0,0 +1,94 @@
+'use strict'
+
+const {
+  PoolBase,
+  kClients,
+  kNeedDrain,
+  kAddClient,
+  kGetDispatcher
+} = require('./pool-base')
+const Client = require('./client')
+const {
+  InvalidArgumentError
+} = require('./core/errors')
+const util = require('./core/util')
+const { kUrl, kInterceptors } = require('./core/symbols')
+const buildConnector = require('./core/connect')
+
+const kOptions = Symbol('options')
+const kConnections = Symbol('connections')
+const kFactory = Symbol('factory')
+
+function defaultFactory (origin, opts) {
+  return new Client(origin, opts)
+}
+
+class Pool extends PoolBase {
+  constructor (origin, {
+    connections,
+    factory = defaultFactory,
+    connect,
+    connectTimeout,
+    tls,
+    maxCachedSessions,
+    socketPath,
+    autoSelectFamily,
+    autoSelectFamilyAttemptTimeout,
+    allowH2,
+    ...options
+  } = {}) {
+    super()
+
+    if (connections != null && (!Number.isFinite(connections) || connections < 0)) {
+      throw new InvalidArgumentError('invalid connections')
+    }
+
+    if (typeof factory !== 'function') {
+      throw new InvalidArgumentError('factory must be a function.')
+    }
+
+    if (connect != null && typeof connect !== 'function' && typeof connect !== 'object') {
+      throw new InvalidArgumentError('connect must be a function or an object')
+    }
+
+    if (typeof connect !== 'function') {
+      connect = buildConnector({
+        ...tls,
+        maxCachedSessions,
+        allowH2,
+        socketPath,
+        timeout: connectTimeout,
+        ...(util.nodeHasAutoSelectFamily && autoSelectFamily ? { autoSelectFamily, autoSelectFamilyAttemptTimeout } : undefined),
+        ...connect
+      })
+    }
+
+    this[kInterceptors] = options.interceptors && options.interceptors.Pool && Array.isArray(options.interceptors.Pool)
+      ? options.interceptors.Pool
+      : []
+    this[kConnections] = connections || null
+    this[kUrl] = util.parseOrigin(origin)
+    this[kOptions] = { ...util.deepClone(options), connect, allowH2 }
+    this[kOptions].interceptors = options.interceptors
+      ? { ...options.interceptors }
+      : undefined
+    this[kFactory] = factory
+  }
+
+  [kGetDispatcher] () {
+    let dispatcher = this[kClients].find(dispatcher => !dispatcher[kNeedDrain])
+
+    if (dispatcher) {
+      return dispatcher
+    }
+
+    if (!this[kConnections] || this[kClients].length < this[kConnections]) {
+      dispatcher = this[kFactory](this[kUrl], this[kOptions])
+      this[kAddClient](dispatcher)
+    }
+
+    return dispatcher
+  }
+}
+
+module.exports = Pool