Minor cleanup, renamed mcache to memcache, added a uuid util function to get consistent and unique uuids across languages.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@921270 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 133 insertions, 0 deletions

diff --git a/sca-cpp/trunk/components/cache/memcache.cpp b/sca-cpp/trunk/components/cache/memcache.cpp
new file mode 100644
index 0000000000..304975614e
--- /dev/null
+++ b/sca-cpp/trunk/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.
+ */
+
+#include <apr_uuid.h>
+
+#include "string.hpp"
+
+#include "function.hpp"
+#include "list.hpp"
+#include "value.hpp"
+#include "monad.hpp"
+#include "memcache.hpp"
+
+namespace tuscany {
+namespace memcache {
+
+/**
+ * Get an item from the cache.
+ */
+const failable<value> get(const list<value>& params, cache::MemCached& ch) {
+    return cache::get(car(params), ch);
+}
+
+/**
+ * Post an item to the cache.
+ */
+const value uuidValue() {
+    apr_uuid_t uuid;
+    apr_uuid_get(&uuid);
+    char buf[APR_UUID_FORMATTED_LENGTH];
+    apr_uuid_format(buf, &uuid);
+    return value(string(buf, APR_UUID_FORMATTED_LENGTH));
+}
+
+const failable<value> post(const list<value>& params, cache::MemCached& ch) {
+    const value id = append<value>(car(params), mklist(uuidValue()));
+    const failable<bool> val = cache::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, cache::MemCached& ch) {
+    const failable<bool> val = cache::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, cache::MemCached& ch) {
+    const failable<bool> val = cache::del(car(params), ch);
+    if (!hasContent(val))
+        return mkfailure<value>(reason(val));
+    return value(content(val));
+}
+
+/**
+ * Component implementation lambda function.
+ */
+class applyCache {
+public:
+    applyCache(cache::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:
+    cache::MemCached& ch;
+};
+
+/**
+ * Start the component.
+ */
+const failable<value> start(unused const list<value>& params) {
+    // Connect to memcached
+    cache::MemCached& ch = *(new (gc_new<cache::MemCached>()) cache::MemCached("127.0.0.1", 11211));
+
+    // 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::memcache::start(cdr(params));
+    return tuscany::mkfailure<tuscany::value>();
+}
+
+}