feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/com/sun/jndi/ldap/pool/ConnectionsRef.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.jndi.ldap.pool;
+
+/**
+ * Is a reference to Connections that is stored in Pool.
+ * This is an intermediate object that is outside of the circular
+ * reference loop of
+ *  com.sun.jndi.ldap.Connection <-> com.sun.jndi.ldap.LdapClient
+ *    <-> com.sun.jndi.ldap.pool.Connections
+ *
+ * Because Connection is a daemon thread, it will keep LdapClient
+ * alive until LdapClient closes Connection. This will in turn
+ * keep Connections alive. So even when Connections is removed
+ * from (the WeakHashMap of) Pool, it won't be finalized.
+ * ConnectionsRef acts as Connections's finalizer.
+ *
+ * Without connection pooling, com.sun.jndi.ldap.LdapCtx's finalize()
+ * closes LdapClient, which in turn closes Connection.
+ * With connection pooling, ConnectionsRef's finalize() calls
+ * Connections.close(), which in turn will close all idle connections
+ * and mark Connections such that in-use connections will be closed
+ * when they are returned to the pool.
+ */
+final class ConnectionsRef {
+    final private Connections conns;
+
+    ConnectionsRef(Connections conns) {
+        this.conns = conns;
+    }
+
+    Connections getConnections() {
+        return conns;
+    }
+}