Initial checkin of gRPC to third_party/

third_party/grpc/src/php/lib/Grpc/AbstractCall.php

Index: third_party/grpc/src/php/lib/Grpc/AbstractCall.php
diff --git a/third_party/grpc/src/php/lib/Grpc/AbstractCall.php b/third_party/grpc/src/php/lib/Grpc/AbstractCall.php
new file mode 100644
index 0000000000000000000000000000000000000000..712af91eb283f3541ce75b3d16f81a1369eea667
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+++ b/third_party/grpc/src/php/lib/Grpc/AbstractCall.php
@@ -0,0 +1,128 @@
+<?php
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+namespace Grpc;
+
+abstract class AbstractCall
+{
+    protected $call;
+    protected $deserialize;
+    protected $metadata;
+
+    /**
+     * Create a new Call wrapper object.
+     *
+     * @param Channel  $channel     The channel to communicate on
+     * @param string   $method      The method to call on the
+     *                              remote server
+     * @param callback $deserialize A callback function to deserialize
+     *                              the response
+     * @param array    $options     Call options (optional)
+     */
+    public function __construct(Channel $channel,
+                                $method,
+                                $deserialize,
+                                $options = [])
+    {
+        if (isset($options['timeout']) &&
+            is_numeric($timeout = $options['timeout'])) {
+            $now = Timeval::now();
+            $delta = new Timeval($timeout);
+            $deadline = $now->add($delta);
+        } else {
+            $deadline = Timeval::infFuture();
+        }
+        $this->call = new Call($channel, $method, $deadline);
+        $this->deserialize = $deserialize;
+        $this->metadata = null;
+        if (isset($options['call_credentials_callback']) &&
+            is_callable($call_credentials_callback =
+                        $options['call_credentials_callback'])) {
+            $call_credentials = CallCredentials::createFromPlugin(
+                $call_credentials_callback);
+            $this->call->setCredentials($call_credentials);
+        }
+    }
+
+    /**
+     * @return The metadata sent by the server.
+     */
+    public function getMetadata()
+    {
+        return $this->metadata;
+    }
+
+    /**
+     * @return string The URI of the endpoint.
+     */
+    public function getPeer()
+    {
+        return $this->call->getPeer();
+    }
+
+    /**
+     * Cancels the call.
+     */
+    public function cancel()
+    {
+        $this->call->cancel();
+    }
+
+    /**
+     * Deserialize a response value to an object.
+     *
+     * @param string $value The binary value to deserialize
+     *
+     * @return The deserialized value
+     */
+    protected function deserializeResponse($value)
+    {
+        if ($value === null) {
+            return;
+        }
+
+        return call_user_func($this->deserialize, $value);
+    }
+
+    /**
+     * Set the CallCredentials for the underlying Call.
+     *
+     * @param CallCredentials $call_credentials The CallCredentials
+     *                                          object
+     */
+    public function setCallCredentials($call_credentials)
+    {
+        $this->call->setCredentials($call_credentials);
+    }
+}