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7.3.2 Maintenance
The APT system relies heavily on several external software libraries and tools. Such as PTCS,
DRAMA, JAS, JSDT, JSNMP, Ant, CVS, the Linux operating System, and many more. Maintaining
these libraries and tools to the latest release version will reap may benefits such as improved
features, reliability and performance.
7.3.3 Client SP server
For security reasons, the SP server only accepts connections from the localhost. Currently there is
only an SP server run on mistral. Development is in progress, with the help of Keith Bannister, to
incorporate an SP Server into the APT Client application. This would allow the execution of APT SP
commands remotely. Once a sufficient set of commands are SP enabled, observers will no
longer need user-level access to mistral.
The SP command set could be deployed using JNLP, and automatically versioned using the
framework in Chapter 6.
7.3.4 Client error control
In many cases user actions will appear to have no effect due to some exception being thrown.
In the current implementation, these exceptions are caught and logged. No further action is
taken. The only way to determine the fate of a failed command is to examine the Client Log or
the Server Log panels.
Although there are limited types of exceptions that can be thrown, the context in which they do
so can narrow down the specific problem. This information should be extracted and conveyed
to the user via a dialog message or some other stimulus such as an discoloured icon.
7.3.5 Improved process information
The Process Manager user interface component introduced in Chapter 5.3, needs to be
accessible to all connected users, not just the user in control. It could also be extended to show
which ProcessSpace a particular process is executing in.
7.3.6 Interactive diagnostics diagram
The APT Hardware Architecture diagram, shown in Figure 2-14, is a very useful resource for
understanding the relationships and dependencies among the hardware and devices that
comprise the APT systems. Knowledge that is vital for diagnosing faults in the system.
An interesting project would be to implement this diagram in software as an interactive user
interface, such that components could be interrogated to obtain status information, and
stimulate the user when events occur. Sounds and animations could be used to depict the
operation of devices, such as a turning motor, or a pulsing cable to indicate data transfer.
Ultimately the user should be able to identify the status of the system at a glance.
This is not a trivial project. The implementation would need to be flexible to cope with the
constant changing of the system, such as the addition of new hardware, or the reconfiguration
of existing components. Many corrections and adjustments were frequently made while this
- 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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