diff options
author | giorgio <giorgio@13f79535-47bb-0310-9956-ffa450edef68> | 2012-09-05 08:31:30 +0000 |
---|---|---|
committer | giorgio <giorgio@13f79535-47bb-0310-9956-ffa450edef68> | 2012-09-05 08:31:30 +0000 |
commit | c9bfccc35345ce58fb5774d4b0b6a9868b262c0a (patch) | |
tree | fe84dd4b90f2acd0b933550b6978094926c1d733 /sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp | |
parent | 5ddabdaf1ff856aae79dadc045ef2aeff08c7887 (diff) |
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1381061 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp')
-rw-r--r-- | sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp b/sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp new file mode 100644 index 0000000000..738a6ddd5a --- /dev/null +++ b/sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp @@ -0,0 +1,133 @@ +/* + * 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>(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>(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>(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 mkfailure<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(const 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>(); +} + +} |