From c9bfccc35345ce58fb5774d4b0b6a9868b262c0a Mon Sep 17 00:00:00 2001
From: giorgio <giorgio@13f79535-47bb-0310-9956-ffa450edef68>
Date: Wed, 5 Sep 2012 08:31:30 +0000
Subject: git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1381061
 13f79535-47bb-0310-9956-ffa450edef68

---
 .../lightweight-sca/components/kvdb/kvdb.cpp       | 124 +++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 sca-cpp/branches/lightweight-sca/components/kvdb/kvdb.cpp

(limited to 'sca-cpp/branches/lightweight-sca/components/kvdb/kvdb.cpp')

diff --git a/sca-cpp/branches/lightweight-sca/components/kvdb/kvdb.cpp b/sca-cpp/branches/lightweight-sca/components/kvdb/kvdb.cpp
new file mode 100644
index 0000000000..0df8f13882
--- /dev/null
+++ b/sca-cpp/branches/lightweight-sca/components/kvdb/kvdb.cpp
@@ -0,0 +1,124 @@
+/*
+ * 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.
+ */
+
+/* $Rev$ $Date$ */
+
+/**
+ * LevelDB-based database component implementation.
+ */
+
+#define WANT_HTTPD_LOG 1
+#include "string.hpp"
+#include "function.hpp"
+#include "list.hpp"
+#include "value.hpp"
+#include "monad.hpp"
+#include "leveldb.hpp"
+
+namespace tuscany {
+namespace nvdb {
+
+/**
+ * Get an item from the database.
+ */
+const failable<value> get(const list<value>& params, leveldb::LevelDB& cdb) {
+    return leveldb::get(car(params), cdb);
+}
+
+/**
+ * Post an item to the database.
+ */
+const failable<value> post(const list<value>& params, leveldb::LevelDB& cdb) {
+    const value id = append<value>(car(params), mklist(mkuuid()));
+    const failable<bool> val = leveldb::post(id, cadr(params), cdb);
+    if (!hasContent(val))
+        return mkfailure<value>(val);
+    return id;
+}
+
+/**
+ * Put an item into the database.
+ */
+const failable<value> put(const list<value>& params, leveldb::LevelDB& cdb) {
+    const failable<bool> val = leveldb::put(car(params), cadr(params), cdb);
+    if (!hasContent(val))
+        return mkfailure<value>(val);
+    return value(content(val));
+}
+
+/**
+ * Delete an item from the database.
+ */
+const failable<value> del(const list<value>& params, leveldb::LevelDB& cdb) {
+    const failable<bool> val = leveldb::del(car(params), cdb);
+    if (!hasContent(val))
+        return mkfailure<value>(val);
+    return value(content(val));
+}
+
+/**
+ * Component implementation lambda function.
+ */
+class applyNoSqldb {
+public:
+    applyNoSqldb(leveldb::LevelDB& cdb) : cdb(cdb) {
+    }
+
+    const value operator()(const list<value>& params) const {
+        const value func(car(params));
+        if (func == "get")
+            return get(cdr(params), cdb);
+        if (func == "post")
+            return post(cdr(params), cdb);
+        if (func == "put")
+            return put(cdr(params), cdb);
+        if (func == "delete")
+            return del(cdr(params), cdb);
+        return mkfailure<value>();
+    }
+
+private:
+    leveldb::LevelDB& cdb;
+};
+
+/**
+ * Start the component.
+ */
+const failable<value> start(unused const list<value>& params) {
+    // Connect to the configured database and table
+    const value dbname = ((lambda<const value(list<value>&)>)car(params))(list<value>());
+    leveldb::LevelDB& cdb = *(new (gc_new<leveldb::LevelDB>()) leveldb::LevelDB(dbname));
+
+    // Return the component implementation lambda function
+    return value(lambda<value(const list<value>&)>(applyNoSqldb(cdb)));
+}
+
+}
+}
+
+extern "C" {
+
+const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
+    const tuscany::value func(car(params));
+    if (func == "start")
+        return tuscany::nosqldb::start(cdr(params));
+    return tuscany::mkfailure<tuscany::value>();
+}
+
+}
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