pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/pool/ConnPool.java

@@ -0,0 +1,68 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package ch.boye.httpclientandroidlib.pool;
+
+import java.util.concurrent.Future;
+
+import ch.boye.httpclientandroidlib.concurrent.FutureCallback;
+
+/**
+ * <tt>ConnPool</tt> represents a shared pool connections can be leased from
+ * and released back to.
+ *
+ * @param <T> the route type that represents the opposite endpoint of a pooled
+ *   connection.
+ * @param <E> the type of the pool entry containing a pooled connection.
+ * @since 4.2
+ */
+public interface ConnPool<T, E> {
+
+    /**
+     * Attempts to lease a connection for the given route and with the given
+     * state from the pool.
+     *
+     * @param route route of the connection.
+     * @param state arbitrary object that represents a particular state
+     *  (usually a security principal or a unique token identifying
+     *  the user whose credentials have been used while establishing the connection).
+     *  May be <code>null</code>.
+     * @param callback operation completion callback.
+     *
+     * @return future for a leased pool entry.
+     */
+    Future<E> lease(final T route, final Object state, final FutureCallback<E> callback);
+
+    /**
+     * Releases the pool entry back to the pool.
+     *
+     * @param entry pool entry leased from the pool
+     * @param reusable flag indicating whether or not the released connection
+     *   is in a consistent state and is safe for further use.
+     */
+    void release(E entry, boolean reusable);
+
+}