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Diffstat (limited to 'sca-cpp/trunk/modules/server/mod-python.hpp')
-rw-r--r-- | sca-cpp/trunk/modules/server/mod-python.hpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/sca-cpp/trunk/modules/server/mod-python.hpp b/sca-cpp/trunk/modules/server/mod-python.hpp new file mode 100644 index 0000000000..7b7b88f211 --- /dev/null +++ b/sca-cpp/trunk/modules/server/mod-python.hpp @@ -0,0 +1,81 @@ +/* + * 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. + */ + +/* $Rev$ $Date$ */ + +#ifndef tuscany_modpython_hpp +#define tuscany_modpython_hpp + +/** + * Evaluation functions used by mod-eval to evaluate implementation.python + * component implementations. + */ + +#include "string.hpp" +#include "stream.hpp" +#include "function.hpp" +#include "list.hpp" +#include "value.hpp" +#include "debug.hpp" +#include "monad.hpp" +#include "../python/eval.hpp" +#include "../http/httpd.hpp" + +namespace tuscany { +namespace server { +namespace modpython { + +/** + * Evaluate a script component implementation function. + */ +struct evalImplementation { + PyObject* impl; + const list<value> px; + evalImplementation(PyObject* impl, const list<value>& px) : impl(impl), px(px) { + } + const value operator()(const list<value>& params) const { + const value expr = append<value>(params, px); + debug(expr, "modeval::python::evalImplementation::input"); + gc_pool pool(gc_current_pool()); + const failable<value> val = python::evalScript(expr, impl, pool); + debug(val, "modeval::python::evalImplementation::result"); + if (!hasContent(val)) + return mklist<value>(value(), reason(val)); + return mklist<value>(content(val)); + } +}; + +/** + * Read a script component implementation. + */ +const failable<lambda<value(const list<value>&)> > readImplementation(const string& path, const list<value>& px) { + ifstream is(path); + if (fail(is)) + return mkfailure<lambda<value(const list<value>&)> >(string("Could not read implementation: ") + path); + const failable<PyObject*> impl = python::readScript(path, is); + if (!hasContent(impl)) + return mkfailure<lambda<value(const list<value>&)> >(reason(impl)); + return lambda<value(const list<value>&)>(evalImplementation(content(impl), px)); +} + +} +} +} + +#endif /* tuscany_modpython_hpp */ |