| /* |
| * 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. |
| */ |
| |
| /* $Rev$ $Date$ */ |
| |
| /** |
| * Memcached-based cache component implementation. |
| */ |
| |
| #define WANT_HTTPD_LOG 1 |
| #include "string.hpp" |
| #include "function.hpp" |
| #include "list.hpp" |
| #include "value.hpp" |
| #include "monad.hpp" |
| #include "memcache.hpp" |
| |
| namespace tuscany { |
| namespace cache { |
| |
| /** |
| * Get an item from the cache. |
| */ |
| const failable<value> get(const list<value>& params, memcache::MemCached& ch) { |
| return memcache::get(car(params), ch); |
| } |
| |
| /** |
| * Post an item to the cache. |
| */ |
| const failable<value> post(const list<value>& params, memcache::MemCached& ch) { |
| const value id = append<value>(car(params), mklist(mkuuid())); |
| const failable<bool> val = memcache::post(id, cadr(params), ch); |
| if (!hasContent(val)) |
| return mkfailure<value>(reason(val)); |
| return id; |
| } |
| |
| /** |
| * Put an item into the cache. |
| */ |
| const failable<value> put(const list<value>& params, memcache::MemCached& ch) { |
| const failable<bool> val = memcache::put(car(params), cadr(params), ch); |
| if (!hasContent(val)) |
| return mkfailure<value>(reason(val)); |
| return value(content(val)); |
| } |
| |
| /** |
| * Delete an item from the cache. |
| */ |
| const failable<value> del(const list<value>& params, memcache::MemCached& ch) { |
| const failable<bool> val = memcache::del(car(params), ch); |
| if (!hasContent(val)) |
| return mkfailure<value>(reason(val)); |
| return value(content(val)); |
| } |
| |
| /** |
| * Component implementation lambda function. |
| */ |
| class applyCache { |
| public: |
| applyCache(memcache::MemCached& ch) : ch(ch) { |
| } |
| |
| const value operator()(const list<value>& params) const { |
| const value func(car(params)); |
| if (func == "get") |
| return get(cdr(params), ch); |
| if (func == "post") |
| return post(cdr(params), ch); |
| if (func == "put") |
| return put(cdr(params), ch); |
| if (func == "delete") |
| return del(cdr(params), ch); |
| return tuscany::mkfailure<tuscany::value>(); |
| } |
| |
| private: |
| memcache::MemCached& ch; |
| }; |
| |
| /** |
| * Convert a list of properties to a list of server addresses. |
| */ |
| const list<string> servers(const list<value>& params) { |
| if (isNil(params)) |
| return list<string>(); |
| const value s = ((lambda<value(list<value>)>)car(params))(list<value>()); |
| return cons<string>(s, servers(cdr(params))); |
| } |
| |
| /** |
| * Start the component. |
| */ |
| const failable<value> start(const list<value>& params) { |
| // Connect to memcached |
| memcache::MemCached& ch = *(new (gc_new<memcache::MemCached>()) memcache::MemCached(servers(params))); |
| |
| // Return the component implementation lambda function |
| return value(lambda<value(const list<value>&)>(applyCache(ch))); |
| } |
| |
| } |
| } |
| |
| extern "C" { |
| |
| const tuscany::value apply(const tuscany::list<tuscany::value>& params) { |
| const tuscany::value func(car(params)); |
| if (func == "start") |
| return tuscany::cache::start(cdr(params)); |
| return tuscany::mkfailure<tuscany::value>(); |
| } |
| |
| } |