Python 7.0pl5 Instrukcja Użytkownika Strona 79
- Strona / 124
- Spis treści
- BOOKMARKI
Oceniono. / 5. Na podstawie oceny klientów
79
Message Encoding
As the service agent framework is designed as a distributed system covering multiple programming
languages, it is necessary that any data being passed around within a report, request or response be se-
rialised into a form suitable for transmission as part of a message. At present the encoded form of the
data uses a subset of XML. That is, it would qualify as being XML, however to make the implemen-
tation easier, the code for decoding such messages will not accept arbitrary XML.
At present the exact form of the XML being used is not revealed as this is being reviewed and will most
likely change. Further, the protocol used between message exchange endpoints is unique to this soft-
ware. It too is being reviewed and will most likely be changed to use some more commonly accept
form of handling message boundaries. Any new mechanism will likely also be designed to be able to
proxy through HTTP servers, thus avoiding issues with closed firewalls.
That the precise details are not being revealed actually makes no difference as it has no bearing in re-
lation to using the software. This is because everything is hidden under a high level API which hides
such details, thus allowing for change in the formats used without requiring changes to applications
using the software. The only instance where changes might have a visible affect is in respect to the
NET-RPC protocol for RPC over HTTP. This would only be an issue if you tried to write your own
client for this protocol.
The one aspect of how data is encoded which will not change is in relation to the means of identifying
different types. Here the XML Schema Datatypes 2001 specification is used as a guide, with Python
types being assigned corresponding types with respect to this specification. Through introduction of
customised encoders and decoders, support for user defined scalar data types may however also be
added.
- Dumpleton 1
- Software 1
- Consulting 1
- Pty Limited 1
- Table of Contents 3
- Manual Overview 7
- Python Modules 9
- Module Descriptions 10
- Installation and Setup 10
- Specifying a Log File 14
- Exceptions in a Callback 17
- Logging Facility 18
- Configuration File 20
- Naming Hierarchies 21
- Environment Variables 21
- Unique Identifiers 22
- Process Identity 23
- Program Setup 24
- Event Framework 26
- Real Time Events 28
- Destroying Agents 29
- Alarms and Timers 29
- Recurring Actions 30
- Socket Events 31
- Program Signals 32
- Program Shutdown 33
- Service Naming 38
- Service Audience 39
- Anonymous Service 39
- Service Registry 41
- Service Announcements 43
- Group Announcements 44
- Service Lookup 44
- Service Reports 47
- Publishing Reports 48
- Monitoring Reports 48
- Lifetime of Reports 50
- Identity of Subscribers 53
- Existence of Publishers 55
- Service Requests 57
- Detecting a Failure 61
- Servicing a Request 64
- Generating a Failure 65
- Delaying a Response 66
- Invalid Request Method 69
- Local Service Requests 69
- Exchange Initialisation 72
- Service Availability 72
- Authorisation of Clients 75
- Distributed Exchange Server 75
- Multiple Exchange Groups 76
- Message Encoding 79
- Mapping of Scalar Types 81
- The HTTP Daemon 88
- The File Server 89
- Client Authorisation 90
- User Authorisation 91
- HTTP Server Objects 91
- The Error Servlet 92
- The Redirect Servlet 93
- The Echo Servlet 93
- The File Servlet 93
- Logging of Requests 94
- Persistent Connections 96
- Destruction of Servlets 98
- Processing Content 99
- The Form Servlet 100
- Slow HTTP Clients 101
- Servlet Objects 102
- Servlet Plugins 106
- Writing a Plugin 108
- Plugin Aliasing 108
- The RPC Gateway 112
- The Client Application 113
- Restricting Client Access 113
- Duplicate Services 114
- User Defined Types 115
- Managing User Sessions 116
- The XML-RPC Gateway 119
- Remote Access 120
Perixx PERITUNE-401 manuals
Owner’s manuals and user’s guides for The input devices Perixx PERITUNE-401.
We providing 1 pdf manuals Perixx PERITUNE-401 for download free by document types: User Manual
Komentarze do niniejszej Instrukcji