summaryrefslogtreecommitdiffstats
path: root/sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp')
-rw-r--r--sca-cpp/branches/lightweight-sca/components/cache/memcache.cpp133
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>();
+}
+
+}