Table of Contents

Service Lookup

44

Service Reports

47

Publishing Reports

48

Monitoring Reports

48

Lifetime of Reports

50

Identity of Subscribers

52

Existence of Publishers

54

Service Requests

57

Sending a Request

57

Handling a Response

59

Identifying a Response

60

Detecting a Failure

61

Lack of Response

63

Servicing a Request

64

Generating a Failure

65

Delaying a Response

66

Identity of the Sender

68

Invalid Request Method

69

Local Service Requests

69

Message Exchange

71

Exchange Initialisation

72

Service Availability

72

Connection Announcements

74

Authorisation of Clients

75

Distributed Exchange Server

75

Multiple Exchange Groups

76

Scalability of the Framework

78

Message Encoding

79

Supported Data Types

80

Mapping of Scalar Types

81

User Defined Types

83

Adding New Mappings

83

Handling Structured Types

.............. 85

Servlet Framework

87

Framework Overview

87

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

Servlet Objects

95

Processing a Request

95

Persistent Connections

96

Delaying a Response

97

Destruction of Servlets

98

Processing Content

99

The Form Servlet

100

Slow HTTP Clients

101

Servlet Plugins

105

Python Plugin

105

Module Caching

107

Writing a Plugin

108

Plugin Aliasing

108

Remote Access

111

The RPC Gateway

112

The Client Application

113

Restricting Client Access

113

Duplicate Services

114

User Defined Types

115

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