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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/execchain/ClientExecChain.java

@@ -0,0 +1,74 @@
+/*
+ * ====================================================================
+ * 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.impl.execchain;
+
+import java.io.IOException;
+
+import ch.boye.httpclientandroidlib.HttpException;
+import ch.boye.httpclientandroidlib.client.methods.CloseableHttpResponse;
+import ch.boye.httpclientandroidlib.client.methods.HttpExecutionAware;
+import ch.boye.httpclientandroidlib.client.methods.HttpRequestWrapper;
+import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
+import ch.boye.httpclientandroidlib.conn.routing.HttpRoute;
+
+/**
+ * This interface represents an element in the HTTP request execution chain. Each element can
+ * either be a decorator around another element that implements a cross cutting aspect or
+ * a self-contained executor capable of producing a response for the given request.
+ * <p/>
+ * Important: please note it is required for decorators that implement post execution aspects
+ * or response post-processing of any sort to release resources associated with the response
+ * by calling {@link CloseableHttpResponse#close()} methods in case of an I/O, protocol or
+ * runtime exception, or in case the response is not propagated to the caller.
+ *
+ * @since 4.3
+ */
+public interface ClientExecChain {
+
+    /**
+     * Executes th request either by transmitting it to the target server or
+     * by passing it onto the next executor in the request execution chain.
+     *
+     * @param route connection route.
+     * @param request current request.
+     * @param clientContext current HTTP context.
+     * @param execAware receiver of notifications of blocking I/O operations.
+     * @return HTTP response either received from the opposite endpoint
+     *   or generated locally.
+     * @throws IOException in case of a I/O error.
+     *   (this type of exceptions are potentially recoverable).
+     * @throws HttpException in case of an HTTP protocol error
+     *   (usually this type of exceptions are non-recoverable).
+     */
+    CloseableHttpResponse execute(
+            HttpRoute route,
+            HttpRequestWrapper request,
+            HttpClientContext clientContext,
+            HttpExecutionAware execAware) throws IOException, HttpException;
+
+}