Remoting patterns

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Pattern: Passivation • Context: • The server application provides stateful remote objects • Problem: • Remote objects may not be accessed by a client for a long time • Still their servants occupy server resources • Problems regarding performance and stability • Solution: • Passivation: • Make remote objects – not accessed for a while – persistent • Then remove the unused servant from memory • Lifecycle Manager reactivates the object again upon the next invocation 66 Uwe Zdun, Markus Voelter, Michael Kircher - <strong>Remoting</strong> Patterns.
Pattern: Passivation (2) Process A Client 1) Machine Boundary 4) Server Process 8) Invoker Servant 4711 7a) 7b) activate() after a timeout: 2a) passivate() 2b) Lifecycle Manager 6) getState(4711, ....) 3) storeState(4711, ....) 5) activate(4711, ....) 67 Uwe Zdun, Markus Voelter, Michael Kircher - <strong>Remoting</strong> Patterns.
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Remoting Patterns Uwe Zdun, Markus
Page 3 and 4:
Patterns and Pattern Languages 3 Uw
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Elements of a Pattern • Name •
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From Patterns to Pattern Languages
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Distributed Systems: Application Ar
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Distributed Systems: Challenges •
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Remoting Styles • There are syste
Page 15 and 16: Remoting Patterns • Numerous proj
Page 17 and 18: Pattern: Broker (2) Process A Proce
Page 19 and 20: Server Application • Remote objec
Page 21 and 22: Basic Remoting Patterns INTERFACE D
Page 23 and 24: Pattern: Requestor (2) Process A Pr
Page 25 and 26: Pattern: Client Proxy (2) Process A
Page 27 and 28: Pattern: Invoker (2) Process A2 Cli
Page 29 and 30: Pattern: Server Request Handler (2)
Page 31 and 32: Pattern: Client Request Handler (2)
Page 33 and 34: Pattern: Marshaller (2) Client Proc
Page 35 and 36: Pattern: Interface Description (2)
Page 37 and 38: Pattern: Remoting Error (2) Process
Page 39 and 40: Interactions: Client-Side Invocatio
Page 41 and 42: Interactions: Remoting Error Propag
Page 43 and 44: Identification Patterns Client look
Page 45 and 46: Pattern: Object ID (2) Process A1 C
Page 47 and 48: Pattern: Absolute Object Reference
Page 49 and 50: Pattern: Lookup (2) Process C Proce
Page 51 and 52: Interactions: Marshalling of Absolu
Page 53 and 54: Lifecycle Management Patterns SERVE
Page 55 and 56: Pattern: Static Instance (2) Proces
Page 57 and 58: Pattern: Per-Request Instance (2) P
Page 59 and 60: Pattern: Client-Dependent Instance
Page 61 and 62: Pattern: Lazy Acquisition (2) Proce
Page 63 and 64: Pattern: Pooling (2) Process A Clie
Page 65: Pattern: Leasing (2) Process A Clie
Page 69 and 70: Interactions: Per-Request Instance
Page 71 and 72: Interactions: Leased Creation Clien
Page 73 and 74: Interactions: Passivation Invoker i
Page 75 and 76: Extension Patterns Client CLIENT PR
Page 77 and 78: Pattern: Invocation Interceptor (2)
Page 79 and 80: Pattern: Invocation Context (2) Pro
Page 81 and 82: Pattern: Protocol Plug-In (2) Proce
Page 83 and 84: Interactions: Server-Side Security
Page 85 and 86: optimizes resource consumption upda
Page 87 and 88: Pattern: Lifecycle Manager (2) 2a)
Page 89 and 90: Pattern: Configuration Group (2) Se
Page 91 and 92: Pattern: Local Object (2) Server Pr
Page 93 and 94: Pattern: QoS Observer (2) 1) Serve
Page 95 and 96: Pattern: Location Forwarder (2) Pro
Page 97 and 98: Invocation Asynchrony Patterns 97 U
Page 99 and 100: Pattern: Fire and Forget • Contex
Page 101 and 102: Pattern: Sync with Server • Conte
Page 103 and 104: Pattern: Poll Object • Context: 1
Page 105 and 106: Pattern: Result Callback • Contex
Page 107 and 108: Pattern: Message Queue • Context:
Page 109 and 110: Relations among the Patterns Acknow
Page 111 and 112: Interactions: Sync with Server Clie
Page 113 and 114: Interactions: Result Callback Clien
Page 115 and 116: Technology Projections 115 Uwe Zdun
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CORBA Technology Projection Name Se
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Web Services • Definition: • A
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Dynamic Invocation on Server Side O
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Constructing an Invocation with a R
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Marshalling • Conversion to SOAP
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Message Processing (2) Client Clien
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Example: Log Handler public class L
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Protocol Integration • Heterogene
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Client-Side Asynchrony • Axis doe
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SAIWS - Invocation Handlers AsyncRe
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SAIWS - Example: Result Callback In
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Other Web Service Frameworks Discus
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