1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* 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 Python
* component implementations.
*/
#include "string.hpp"
#include "stream.hpp"
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
#include "monad.hpp"
#include "eval.hpp"
namespace tuscany {
namespace server {
namespace modpython {
/**
* Evaluate a Python component implementation and convert it to an applicable
* lambda function.
*/
const failable<lvvlambda > evalImplementation(const string& path, const value& impl, const list<value>& px, python::PythonRuntime& py) {
const string spath(attributeValue("script", impl));
const string fpath(path + spath);
ifstream is(fpath);
if (fail(is))
return mkfailure<lvvlambda >(string("Could not read implementation: ") + fpath);
const failable<PyObject*> fscript = python::readScript(python::moduleName(spath), fpath, is, py);
if (!hasContent(fscript))
return mkfailure<lvvlambda >(fscript);
PyObject* const script = content(fscript);
const lvvlambda applyImplementation = [script, px, &py](const list<value>& params) -> const value {
// Apply a Python component implementation function
const value expr = append<value>(params, px);
debug(expr, "modeval::python::applyImplementation::input");
const failable<value> res = python::evalScript(expr, script, py);
const value val = !hasContent(res)? mklist<value>(nilValue, reason(res), rcode(res)) : mklist<value>(content(res));
debug(val, "modeval::python::applyImplementation::result");
return val;
};
return applyImplementation;
}
}
}
}
#endif /* tuscany_modpython_hpp */
|
