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6 APT software deployment
6.1 Introduction
The APT software is a very complex system of integrated software components and is constantly
under development. The Java APT source code alone is approximately 8000 lines across 300
source files. The system also depends on several external packages such as the JAS and JSDT.
Unfortunately, there is no test platform
i
and consequently the system spends the majority of its
time running a test version of the software. Although thorough testing is important, it is crucial to
preserve the ability to run an older (release) version of the software known to run properly.
Such a large and unique system requires code management tools to allow for more efficient
development. To summarise, the APT software deployment system must satisfy the following
requirements:
• Allow multiple developers to work on the code simultaneously.
• Compile and deploy multiple versions of the software in an efficient manner.
• Roll back to previous trusted versions when more reliable operation is required. i.e.
Observing.
• Distribute client code to potentially large and diverse user bases. Eg, Classroom
environment, professional astronomers.
• Guarantee that all clients are running the correct, compatible version of the code.
• Adapt to future changes to the structure of the application. For example, the
introduction of additional libraries.
6.2 Version control
Since the development of the JAS and the APTServer, the entire code base has been managed
within a CVS
ii
repository. CVS is the de facto industry standard version control system, rivalling
commercial products such as Microsoft Visual SourceSafe and Rational Clearcase. CVS
fundamentally allows multiple users access to the source tree, as well as maintaining a history of
all changes made to each file. CVS also supports binary files, such as libraries, allowing the entire
programming workspace to be stored in the repository.
Installation instructions for using CVS with the APT source code are included in Appendix C.
6.3 JNLP & Java Web Start
Java Web Start is Sun’s reference implementation of JNLP
iii
. The Java Network Launch Protocol
[ 47 ] is a specification published by Sun designed to streamline the deployment of Java
applications over the Internet. It is used to manage and distribute the APT Client applications to
all users.
i
The JAS test harness developed by Keith Bannister has not been updated to use JAS2
ii
Concurrent Versions System
iii
Java Network Launch Protocol
- Oliver Mather 1
- Abstract 3
- Acknowledgements 5
- Contents 7
- List of Figures 9
- 1 Introduction 11
- 2 APT hardware 13
- 2.3 Mistral 14
- 2.4 Telescope 14
- 2.5 CCD 16
- 2.6 Telescope movement 16
- 2.6.1 Anti backlash motor 17
- 2.6.2 Limit switches 18
- 2.6.3 Tilt sensor 19
- 2.6.4 Macrostation 19
- 2.7 Masterswitch 20
- 2.8 Web cameras 21
- 2.10 Roof 22
- 2.11 ROTSE 23
- ParralelRS232RS232 24
- 3 APT software 25
- 3.3 Command line tools 26
- 3.4.1 Introduction 27
- 3.4.2 Architecture 27
- 3.5 APT server 28
- 4.1 Introduction 31
- 4.3 Code 32
- 4.3.2 Configuration 33
- 4.3.3 SNMP messages 33
- 4.4 JAS integration 34
- 4.4.1 Commands 35
- 4.4.2 Messages 36
- 4.5 Screenshots 37
- 4.6 Conclusion 38
- 5.1 Introduction 39
- 5.2 Architecture 40
- 5.3 Process manager 40
- 5.4 Roof 41
- 5.5 Chat system 43
- Figure 5-8 APT chat system 44
- 5.6 Look and Feel 45
- 5.6.2 Problems 46
- 5.6.3 Screenshots 46
- 5.7 Conclusion 47
- 6 APT software deployment 49
- 6.3.1 Versioning 50
- 6.3.2 Security 51
- 6.4 Compilation 52
- 6.5 Version synchronisation 55
- 6.6 Uploading 56
- 6.7 Conclusion 57
- 7.1 Introduction 59
- 7.2 Hardware 59
- 7.3 Software 59
- 7.3.2 Maintenance 60
- 7.3.3 Client SP server 60
- 7.3.4 Client error control 60
- 7.4 Conclusion 62
- 8 SkinnedTextField 63
- 8.4 TextSkin 64
- 8.5 SkinnedTextFieldDemo 65
- 9 CSIRO SEARFE project 69
- 9.3 Requirements 70
- 9.4 Hardware 71
- 9.5 Architecture 71
- 9.5.1 Data files 72
- 9.6 User interface 73
- 9.6.2 Data visualisation 76
- 9.7.1 Visualisations 80
- 9.8 Conclusion 81
- 10 Conclusion 83
- 10.4 Logging analysis 84
- Bibliography 87
- A. Glossary 89
- B.1. Introduction 91
- B.2. JAS message sender 91
- B.4. Creating JAS commands 91
- B.4.1. JASCommand object 92
- B.4.2. Installing commands 92
- B.5. JAS channel monitoring 93
- C. Software tools 95
- C.1.3. Checkout the code 96
- C.1.4. CVS user interfaces 96
- D. SNMP overview 97
- Response 98
- RequestRequest 98
- E. Astronomy primer 99
- E.1.3. Coordinate epochs 100
- E.2. Astronomical times 101
- E.3. Gamma ray bursts 102
- E.4. Astronomical filters 102
- E.5. Flat fielding 103
- E.6. Cosmic rays 103
- F. Selected code listings 105
- F.1.6. SnmpTrapDaemon.java 121
- F.2. APT deployment system 132
- F.2.3. apt build.xml 134
- F.2.4. lib build.xml 141
- F.3. CSIRO / SEARFE 144
- F.4. TextSkin 145
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