System Introspection for System Analysis on Mobile Devices

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1 2 Hello user 2!3 Listing 4.1: Typical stanza <strong>for</strong> a message - The message stanza holdsthe attributes <strong>for</strong> the sender and the recipient. The textto be send is placed inside a body element.XMPP ServerPublic XMPP servers can be found on the internet. For testing purpose theprobe and a local XMPP server have been installed on the same laptop. AsXMPP server used <strong>for</strong> the communication between the probe and the clientthe Openfire 14 server is used. Openfire is an open source server written in Javawith supports <strong>for</strong> XMPP communication.14 http://www.webcitation.org/5wiKd8MIK - XMPP Server by ignite realtime19
5 <strong>System</strong> DesignThe following chapter covers the design of the probe, the client and the communicationinterface used <strong>for</strong> communication between both entities. The designof each element is described in detail here. To distinguish the components ofthe robot and the probe, components running on the probe will be referred toas component threads. Components of the robot will be referred to simply ascomponents.Requirements revisitedA robot acting in an autonomous way with a lot of components running inparallel is limited in resources it can spare. Especially ToBI running over 20components controlled by two laptops is limited. One of the main requirements<strong>for</strong> the probe and the client is the minimized use of resources available. Tominimize the influence on the behavior of the robot this requirement mustbe considered permanently. Another important requirement is to create anexchangeable communication interface. Due to changes of the components,the payload of data is not fix and can change very fast. For example thefrequency of in<strong>for</strong>mation retrieval may be higher then the used communicationtechnology can handle. A promising way to deal with this problem is to capsulethe communication interface beginning at the design. Due to the fact thatoften groups of developers integrate components the system needs to supportmultiple users observing at the same time which requires parallel work to betaken into consideration. Also extension of the system must be possible. Whennew components are attached to the robot these components must be easilyadded to the probe and the client.Overview of all <strong>System</strong> ElementsFigure 5.1 shows the architecture of the whole system containing the robot,the probe and the client. To capsule the robots components the probe uses theBonSAI interface (see chapter 4.2). The probe and the client use their own20
Page 1: Bringing System <s
Page 5 and 6: AbstractSystem <st
Page 7 and 8: output, so each component is offeri
Page 9 and 10: of the system and the decisions mad
Page 11 and 12: created a telelaboratory where two
Page 13 and 14: Like the telelaboratory there is a
Page 15 and 16: with a very high frequency which ma
Page 17 and 18: Due to improving technology the use
Page 19 and 20: Figure 4.1: ToBI platfor</s
Page 21 and 22: Figure 4.3: The architecture behind
Page 23: Figure 4.5: Typical instant messagi
Page 27 and 28: Figure 5.2: Message exchange betwee
Page 29 and 30: Figure 5.4: Beacon running between
Page 31 and 32: Figure 5.5: Reading and processing
Page 33 and 34: data and only forw
Page 35 and 36: For example a developer can select
Page 37 and 38: Figure 5.13: Principle of tabbed na
Page 39 and 40: 6.1 The Communication InterfaceThe
Page 41 and 42: 6.2 The Probe - Implementation of t
Page 43 and 44: stop all active processes of the co
Page 45 and 46: is received containing the TAG of t
Page 47 and 48: The selected sensors give a good im
Page 49 and 50: 1 2 4 6 8 Listing 6.2: Example of t
Page 51 and 52: TabConfig - The Status ViewThe TabC
Page 53 and 54: Each view adds a listener to the co
Page 55 and 56: LoginController which also observes
Page 57 and 58: tends the JPanel class. The templat
Page 59 and 60: 7 EvaluationIn the previous chapter
Page 61 and 62: Name Description CharactersSingleli
Page 63 and 64: Figure 7.1: Latency of receiving da
Page 65 and 66: For this thesis only a rough estima
Page 67 and 68: Laptop CPU load without Probe CPU l
Page 69 and 70: 8 ConclusionsIn the context of this
Page 71 and 72: 9 OutlookGiven this new tool its no
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BibliographyBurrell, A. and A. Soda
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6.10 Main classes of the Java clien
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AppendixUse CasesUse Case 1: Connec
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Use Case 4: Disconnect from compone
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Use Case 9: Sending beacon to keep
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Figure 9.4: Latency of receiving da
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