1/**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements.  See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership.  The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License.  You may obtain a copy of the License at
10 *
11 *   http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied.  See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24#ifndef __com_sun_star_ucb_XCommandProcessor_idl__
25#define __com_sun_star_ucb_XCommandProcessor_idl__
26
27#ifndef __com_sun_star_uno_XInterface_idl__
28#include <com/sun/star/uno/XInterface.idl>
29#endif
30
31#ifndef __com_sun_star_ucb_XCommandEnvironment_idl__
32#include <com/sun/star/ucb/XCommandEnvironment.idl>
33#endif
34
35#ifndef __com_sun_star_ucb_Command_idl__
36#include <com/sun/star/ucb/Command.idl>
37#endif
38
39#ifndef __com_sun_star_ucb_CommandAbortedException_idl__
40#include <com/sun/star/ucb/CommandAbortedException.idl>
41#endif
42
43//=============================================================================
44
45module com { module sun { module star { module ucb {
46
47//=============================================================================
48/** defines a processor for synchronous commands, which are executed in a
49    specific execution environment.
50
51	@version  1.0
52	@author   Kai Sommerfeld
53
54    @see com::sun::star::ucb::XCommandProcessor2
55    for the improved version of this interface.
56
57	@see	  Command
58	@see      XCommandEnvironment
59	@see      XContent
60*/
61published interface XCommandProcessor : com::sun::star::uno::XInterface
62{
63	//-------------------------------------------------------------------------
64	/** creates a unique identifier for a command.
65
66	    <p>This identifier can be used to abort the execution of the command
67		accociated with that identifier. Note that it is generally not
68		necessary to obtain a new id for each command, because commands are
69		executed synchronously. So the id for a command is valid again after a
70		command previously associated with this id has finished. In fact you
71		only should get one identifier per thread and assign it to every
72		command executed by that thread.</p>
73
74        <p>Also, after a call to <member>XCommandProcessor::abort</member>, an
75        identifier should not be used any longer (and instead be released by a
76        call to <member>XCommandProcessor2::releaseCommandIdentifier</member>),
77		because it may well abort <em>all</em> further calls to
78        <member>XCommandProcessor::execute</member>.</p>
79
80        <p>To avoid ever-increasing resource consumption, the identifier
81        should be released via
82        <member>XCommandProcessor2::releaseCommandIdentifier</member>
83        when it is no longer used.</p>
84
85		@returns
86		a command identifier.
87	*/
88	long createCommandIdentifier();
89
90	//-------------------------------------------------------------------------
91	/** executes a command.
92
93		<p>Common command definitions can be found in the soecification of the
94		service	<type>Content</type>.
95
96		@param aCommand
97		is the command to execute.
98
99		@param CommandId
100		is a unique id for the command. This identifier was obtained by calling
101		<member>XCommandProcessor::createCommandIdentifier</member>. A value of
102        zero can be used, if the command never shall be aborted. Different
103        threads MUST NOT share one command identifier (except <code>0</code>).
104        This can easily achieved, if every thread that wants to use an
105        <type>XCommandProcessor</type>, obtains exactly one identifier
106        using <member>XCommandProcessor::createCommandIdentifier</member>.
107        This identifier can be used for every call to
108        <member>XCommandProcessor::execute</member> done by that thread.
109
110		@param Environment
111		is the execution environment.
112
113		@returns
114		the result according to the specification of the command.
115
116		@throws CommandAbortedException
117		to indicate that the command was aborted.
118
119        @throws DuplicateCommandIdentifierException
120        to indicate that two threads tried to use the same command identifier
121
122		@throws Exception
123		if an error occured during the execution of the command.
124	*/
125	any execute( [in] Command aCommand,
126				 [in] long CommandId,
127				 [in] XCommandEnvironment Environment )
128		raises ( com::sun::star::uno::Exception, CommandAbortedException );
129
130	//-------------------------------------------------------------------------
131	/** ends the command associated with the given id.
132
133        <p>Not every command can be aborted. It's up to the implementation
134        to decide whether this method will actually end the processing of
135        the command or simply do nothing.
136
137		@param CommandId
138		is a unique id for the command to abort. This must be the identifier
139		passed to <member>XCommandProcessor::execute</member> for the command
140		to abort.
141	*/
142	[oneway] void abort( [in] long CommandId );
143};
144
145//=============================================================================
146
147}; }; }; };
148
149#endif
150