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  • Is there a way to flush html to the wire in Sinatra

    - by thismatt
    I have a Sinatra app with a long running process (a web scraper). I'd like the app flush the results of the crawler's progress as the crawler is running instead of at the end. I've considered forking the request and doing something fancy with ajax but this is a really basic one-pager app that really just needs to output a log to a browser as it's happening. Any suggestions?

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  • The physical working paradigm of a signal passing on wire.

    - by smwikipedia
    Hi, This may be more a question of physics, so pardon me if there's any inconvenience. When I study computer networks, I often read something like this in order to represent a signal, we place some voltage on one end of the wire and the other end will detect the voltage and thus the signal. So I am wondering how a signal exactly passes through wire? Here's my current understanding based on my formal knowledge about electronics: First we need a close circuit to constrain/hold the electronic field. When we place a voltage at somewhere A of the circuit, electronic field will start to build up within the circuit medium, this process should be as fast as light speed. And as the electronic field is being built up, the electrons within the circuit medium are moved, and thus electronic current occurs, and once the electronic current is strong enough to be detected at somewhere else B on the complete circuit, then B knows about what has happend at A and thus communication between A and B is achieved. The above is only talking about the process of sending a single voltage through wire. If there's a bitstream and we need to send a series of voltages, I am not sure which of the following is true: The 2nd voltage should only be sent from A after the 1st voltage has been detected at B, the time interval is time needed to stimulate the electronic field in the medium and form a detectable electronic current at B. Several different voltages could be sent on wire one by one, different electronic current values will exists along the wire simutaneously and arrive at B successively. I hope I made myself clear and someone else has ever pondered this question. (I tag this question with network cause I don't know if there's a better option.) Thanks, Sam

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  • Do all the network cards use the same frequency to send signals to wire?

    - by smwikipedia
    I am comparing my cable TV wire to my network wire. In a TV cable wire, different frequencies are used by different TV channels. And since a certain channel use a fixed frequency, I think the only left way to represent different signal is with the carrier wave's amplitude. But what about the network wire? For all the network cards with the same type, do they also use different frequencies to send signals just like TV cable? I vaguely remember that they use frequency adjustment to represent signals. So the frequency should not be a fixed one. So how did all the network cards that sharing the same medium differentiate their own signal from others?

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  • What the best way to wire up Entity Framework database context (model) to ViewModel in MVVM WPF?

    - by hal9k2
    As in the question above: What the best way to wire up Entity Framework database model (context) to viewModel in MVVM (WPF)? I am learning MVVM pattern in WPF, alot of examples shows how to implement model to viewModel, but models in that examples are just simple classes, I want to use MVVM together with entity framework model (base first approach). Whats the best way to wire model to viewModel. Thanks for answers. //ctor of ViewModel public ViewModel() { db = new PackageShipmentDBEntities(); // Entity Framework generated class ListaZBazy = new ObservableCollection<Pack>(db.Packs.Where(w => w.IsSent == false)); } This is my usual ctor of ViewModel, think there is a better way, I was reading about repository pattern, not sure if I can adapt this to WPF MVVM

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  • Does water damage a fiber optic / cat5 cable

    - by chris
    One of the buildings I support recently had an adventure with a broken fire sprinkler. Lots of water everywhere. One of the "drains" the water used was the vertical risers between network closets. The cable plant in this building has bundles of cat5e as well as conduit with bundles of multimode fiber optic cables. The fiber is standard multi strand plenum rated stuff that terminates in boxes that have the patches to the switches. As far as I can tell, no water got near the ends of the cables (fiber or copper) but the conduit was saturated, and is likely still saturated because there isn't any air flow to dry the cables out. My gut reaction is that while it didn't do the cables any favors, it likely also isn't going to cause any problems. A little more reading / googling around leads me to believe that the water may cause problems down the road. Some pretty pictures so everyone knows what I'm talking about: Fiber conduit: Vertical riser, going down: Vertical riser, going up: Does anyone have any experience with this sort of damage and how to deal with it? Should we just ask the insurance adjuster to add "pull new structured cable" to the list of things to be replaced? And, if the opinion is "replace it because it'll start failing randomly over time" please include links that describe the specific failure modes, so I've got some ammo to use with the adjuster.

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  • Does all the network card use the same frequency to send signals to wire?

    - by smwikipedia
    Hi, I am comparing my cable TV wire to my network wire. In a TV cable wire, different frequencies are used by different TV channels. And since a certain channel use a fixed frequency, I think the only left way to represent different signal is with the carrier wave's amplitude. But what about the network wire? For all the network card with the same type, do they also use different frequencies to send signals just like TV cable? I vaguely remember that they use frequency adjustment to represent signals. So the frequency should not be a fixed one. So how did all the network cards that sharing the same medium differentiate their own signal from others?

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  • SSL / HTTP / No Response to Curl

    - by Alex McHale
    I am trying to send commands to a SOAP service, and getting nothing in reply. The SOAP service is at a completely separate site from either server I am testing with. I have written a dummy script with the SOAP XML embedded. When I run it at my local site, on any of three machines -- OSX, Ubuntu, or CentOS 5.3 -- it completes successfully with a good response. I then sent the script to our public host at Slicehost, where I fail to get the response back from the SOAP service. It accepts the TCP socket and proceeds with the SSL handshake. I do not however receive any valid HTTP response. This is the case whether I use my script or curl on the command line. I have rewritten the script using SOAP4R, Net::HTTP and Curb. All of which work at my local site, none of which work at the Slicehost site. I have tried to assemble the CentOS box as closely to match my Slicehost server as possible. I rebuilt the Slice to be a stock CentOS 5.3 and stock CentOS 5.4 with the same results. When I look at a tcpdump of the bad sessions on Slicehost, I see my script or curl send the XML to the remote server, and nothing comes back. When I look at the tcpdump at my local site, I see the response just fine. I have entirely disabled iptables on the Slice. Does anyone have any ideas what could be causing these results? Please let me know what additional information I can furnish. Thank you! Below is a wire trace of a sample session. The IP that starts with 173 is my server while the IP that starts with 12 is the SOAP server's. No. Time Source Destination Protocol Info 1 0.000000 173.45.x.x 12.36.x.x TCP 36872 > https [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=137633469 TSER=0 WS=6 Frame 1 (74 bytes on wire, 74 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 0, Len: 0 No. Time Source Destination Protocol Info 2 0.040000 12.36.x.x 173.45.x.x TCP https > 36872 [SYN, ACK] Seq=0 Ack=1 Win=8760 Len=0 MSS=1460 Frame 2 (62 bytes on wire, 62 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 0, Ack: 1, Len: 0 No. Time Source Destination Protocol Info 3 0.040000 173.45.x.x 12.36.x.x TCP 36872 > https [ACK] Seq=1 Ack=1 Win=5840 Len=0 Frame 3 (54 bytes on wire, 54 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 1, Ack: 1, Len: 0 No. Time Source Destination Protocol Info 4 0.050000 173.45.x.x 12.36.x.x SSLv2 Client Hello Frame 4 (156 bytes on wire, 156 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 1, Ack: 1, Len: 102 Secure Socket Layer No. Time Source Destination Protocol Info 5 0.130000 12.36.x.x 173.45.x.x TCP [TCP segment of a reassembled PDU] Frame 5 (1434 bytes on wire, 1434 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 1, Ack: 103, Len: 1380 Secure Socket Layer No. Time Source Destination Protocol Info 6 0.130000 173.45.x.x 12.36.x.x TCP 36872 > https [ACK] Seq=103 Ack=1381 Win=8280 Len=0 Frame 6 (54 bytes on wire, 54 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 103, Ack: 1381, Len: 0 No. Time Source Destination Protocol Info 7 0.130000 12.36.x.x 173.45.x.x TLSv1 Server Hello, Certificate, Server Hello Done Frame 7 (1280 bytes on wire, 1280 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 1381, Ack: 103, Len: 1226 [Reassembled TCP Segments (2606 bytes): #5(1380), #7(1226)] Secure Socket Layer No. Time Source Destination Protocol Info 8 0.130000 173.45.x.x 12.36.x.x TCP 36872 > https [ACK] Seq=103 Ack=2607 Win=11040 Len=0 Frame 8 (54 bytes on wire, 54 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 103, Ack: 2607, Len: 0 No. Time Source Destination Protocol Info 9 0.130000 173.45.x.x 12.36.x.x TLSv1 Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message Frame 9 (236 bytes on wire, 236 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 103, Ack: 2607, Len: 182 Secure Socket Layer No. Time Source Destination Protocol Info 10 0.190000 12.36.x.x 173.45.x.x TLSv1 Change Cipher Spec, Encrypted Handshake Message Frame 10 (97 bytes on wire, 97 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 2607, Ack: 285, Len: 43 Secure Socket Layer No. Time Source Destination Protocol Info 11 0.190000 173.45.x.x 12.36.x.x TLSv1 Application Data Frame 11 (347 bytes on wire, 347 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 285, Ack: 2650, Len: 293 Secure Socket Layer No. Time Source Destination Protocol Info 12 0.190000 173.45.x.x 12.36.x.x TCP [TCP segment of a reassembled PDU] Frame 12 (1514 bytes on wire, 1514 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 578, Ack: 2650, Len: 1460 Secure Socket Layer No. Time Source Destination Protocol Info 13 0.450000 12.36.x.x 173.45.x.x TCP https > 36872 [ACK] Seq=2650 Ack=578 Win=64958 Len=0 Frame 13 (54 bytes on wire, 54 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 2650, Ack: 578, Len: 0 No. Time Source Destination Protocol Info 14 0.450000 173.45.x.x 12.36.x.x TCP [TCP segment of a reassembled PDU] Frame 14 (206 bytes on wire, 206 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 2038, Ack: 2650, Len: 152 No. Time Source Destination Protocol Info 15 0.510000 12.36.x.x 173.45.x.x TCP [TCP Dup ACK 13#1] https > 36872 [ACK] Seq=2650 Ack=578 Win=64958 Len=0 Frame 15 (54 bytes on wire, 54 bytes captured) Ethernet II, Src: Dell_fb:49:a1 (00:21:9b:fb:49:a1), Dst: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6) Internet Protocol, Src: 12.36.x.x (12.36.x.x), Dst: 173.45.x.x (173.45.x.x) Transmission Control Protocol, Src Port: https (443), Dst Port: 36872 (36872), Seq: 2650, Ack: 578, Len: 0 No. Time Source Destination Protocol Info 16 0.850000 173.45.x.x 12.36.x.x TCP [TCP Retransmission] [TCP segment of a reassembled PDU] Frame 16 (1514 bytes on wire, 1514 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 578, Ack: 2650, Len: 1460 Secure Socket Layer No. Time Source Destination Protocol Info 17 1.650000 173.45.x.x 12.36.x.x TCP [TCP Retransmission] [TCP segment of a reassembled PDU] Frame 17 (1514 bytes on wire, 1514 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 578, Ack: 2650, Len: 1460 Secure Socket Layer No. Time Source Destination Protocol Info 18 3.250000 173.45.x.x 12.36.x.x TCP [TCP Retransmission] [TCP segment of a reassembled PDU] Frame 18 (1514 bytes on wire, 1514 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 578, Ack: 2650, Len: 1460 Secure Socket Layer No. Time Source Destination Protocol Info 19 6.450000 173.45.x.x 12.36.x.x TCP [TCP Retransmission] [TCP segment of a reassembled PDU] Frame 19 (1514 bytes on wire, 1514 bytes captured) Ethernet II, Src: 40:40:17:3a:f4:e6 (40:40:17:3a:f4:e6), Dst: Dell_fb:49:a1 (00:21:9b:fb:49:a1) Internet Protocol, Src: 173.45.x.x (173.45.x.x), Dst: 12.36.x.x (12.36.x.x) Transmission Control Protocol, Src Port: 36872 (36872), Dst Port: https (443), Seq: 578, Ack: 2650, Len: 1460 Secure Socket Layer

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  • What is the "in-the-wire" size of a ethernet frame? 1518 or 1542?

    - by chrisapotek
    According to the table here, it says that MTU = 1500 bytes and that the payload part is 1500 - 42 bytes or 1458 bytes (<- this is actually wrong!). Now on top of that you have to add IPv4 and UDP headers, which are 28 bytes (20 IP + 8 UDP). That leaves my maximum possible application message to as 1430 bytes! But by looking for this number in the Internet I see 1472 instead. Am I doing this calculation wrong here? All I want to find out is the maximum application message I can send over the wire without the risk of fragmentation. It is definitely not 1500 because that includes the frame headers. Can someone help? The confusion is the the PAYLOAD can actually be as large as 1500 bytes and that's the MTU. So now what is the size in-the-wire for a payload of 1500? From that table it can be as big as 1542 bytes. So the maximum app messages I can send is 1472 (1500 - 20 (ip) - 8 (udp)) for a maximum in the wire size of 1542. It amazes me how things can get so complicated when they are actually simple. And I have not clue how someone came up with the number 1518 if the table says 1542.

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  • 1k of Program Space, 64 bytes of RAM. Is 1 wire communication possible?

    - by Earlz
    (If your lazy see bottom for TL;DR) Hello, I am planning to build a new (prototype) project dealing with physical computing. Basically, I have wires. These wires all need to have their voltage read at the same time. More than a few hundred microseconds difference between the readings of each wire will completely screw it up. The Arduino takes about 114 microseconds. So the most I could read is 2 or 3 wires before the latency would skew the accuracy of the readings. So my plan is to have an Arduino as the "master" of an array of ATTinys. The arduino is pretty cramped for space, but it's a massive playground compared to the tinys. An ATTiny13A has 1k of flash ROM(program space), 64 bytes of RAM, and 64 bytes of (not-durable and slow) EEPROM. (I'm choosing this for price as well as size) The ATTinys in my system will not do much. Basically, all they will do is wait for a signal from the Master, and then read the voltage of 1 or 2 wires and store it in RAM(or possibly EEPROM if it's that cramped). And then send it to the Master using only 1 wire for data.(no room for more than that!). So far then, all I should have to do is implement trivial voltage reading code (using built in ADC). But this communication bit I'm worried about. Do you think a communication protocol(using just 1 wire!) could even be implemented in such constraints? TL;DR: In less than 1k of program space and 64 bytes of RAM(and 64 bytes of EEPROM) do you think it is possible to implement a 1 wire communication protocol? Would I need to drop to assembly to make it fit? I know that currently my Arduino programs linking to the Wiring library are over 8k, so I'm a bit concerned.

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  • How to wire 20 computers and 20 phones and 1 server into LAN?

    - by John Smith
    I have currently 3 switches Two Netgear JFS524 with 24 slots, One Belkin with 16 slots. Server DSL Internet Router. Main question is how to connect switches together, two Netgear's are next to each other, yet one is about 100 feet away and holds about 5 computer and 5 phones. If i connect them with only 1 wire will that limit bandwidth? e.g. all 23 computers will be limited to speed of one CAT5e cable? If i connect switches with 2 cables will this give speed boost? What's the ideal scenario should i just move the third switch next to other two? Will the speed of computer connected to white switch be same as computer connected to top switch? Will moving white switch right next top switch and having 16 wires comming 100 feet instead of 1 wire comming 100 feet make it faster? EDIT 1: I actually have NETGEAR ProSafe GS105 Gigabit switch its only has 4 ports in it though, you think i can have use of it in current setup? Like connect all 3 switches and server into it and keep internet router and phone server on one of the slower switches EDIT 2: Everyone mention gigabit switches, but will they do any difference with 10/100 network cards? I then have to use gigabit cards in every computer too? I could in server perhaps, but users will be 10/100

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  • How to wire finite state machine into component-based architecture?

    - by Pup
    State machines seem to cause harmful dependencies in component-based architectures. How, specifically, is communication handled between a state machine and the components that carry out state-related behavior? Where I'm at: I'm new to component-based architectures. I'm making a fighting game, although I don't think that should matter. I envision my state machine being used to toggle states like "crouching", "dashing", "blocking", etc. I've found this state-management technique to be the most natural system for a component-based architecture, but it conflicts with techniques I've read about: Dynamic Game Object Component System for Mutable Behavior Characters It suggests that all components activate/deactivate themselves by continually checking a condition for activation. I think that actions like "running" or "walking" make sense as states, which is in disagreement with the accepted response here: finite state machine used in mario like platform game I've found this useful, but ambiguous: How to implement behavior in a component-based game architecture? It suggests having a separate component that contains nothing but a state machine. But, this necessitates some kind of coupling between the state machine component and nearly all the other components. I don't understand how this coupling should be handled. These are some guesses: A. Components depend on state machine: Components receive reference to state machine component's getState(), which returns an enumeration constant. Components update themselves regularly and check this as needed. B. State machine depends on components: The state machine component receives references to all the components it's monitoring. It queries their getState() methods to see where they're at. C. Some abstraction between them Use an event hub? Command pattern? D. Separate state objects that reference components State Pattern is used. Separate state objects are created, which activate/deactivate a set of components. State machine switches between state objects. I'm looking at components as implementations of aspects. They do everything that's needed internally to make that aspect happen. It seems like components should function on their own, without relying on other components. I know some dependencies are necessary, but state machines seem to want to control all of my components.

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  • Down to the Wire - Yet More Solaris Things to See at OpenWorld (and JavaOne!)

    - by Larry Wake
    San Francisco is bracing for the annual invasion. The airport's jammed, the tweets are flying, and the numbers are crazy: more than 50,000 attendees and 2,500+ sessions, taking over Moscone Convention Center, two streets, Union Square, and seemingly every hotel in town (98,000 hotel room nights). So yeah, it's busy. And it's not just OpenWorld--we've also got JavaOne, MySQL Connect, and four other sub-events going on as well. Speaking of JavaOne, you can find Solaris-related activity there, too -- I've highlighted one hands-on lab below. Here's a last pre-event roundup of activities for consideration; enjoy the show(s)! (Remember, Schedule Builder is your friend; use it with the session numbers below to register.) Monday, October 1st: 3:15 PM - General Session: Accelerate Your Business with the Oracle Hardware Advantage(GEN9691, Moscone North Hall D) John Fowler, head of Oracle's Systems organization, will talk about Oracle hardware technology and how it's co-engineered with other key technologies, including Oracle Solaris. Tuesday, October 2nd: 10:15 AM - Building an IaaS Platform with SPARC, Oracle Solaris 11, and Oracle VM Server for SPARC(CON4431, Moscone South 270)Get the birds-eye lowdown (whatever that means) on how U.S. Cellular  built its Infrastructure as a Service (IaaS) cloud delivery platform with Oracle’s SPARC T4 servers, Oracle Solaris 11, Oracle Solaris Cluster 4, and Oracle VM Server for SPARC. The session covers the high-level design, business case made, implementation details, and lessons learned. 11:45 AM - Oracle Solaris 11 Panel: Insights and Directions from Oracle Solaris Core Engineering(CON8790, Moscone South 252) This has been one of the livelier Solaris-related sessions in years past (and I'm not saying that just because I get to moderate it this year). A panel of core engineers responsible for a wide range of key Solaris technologies will talk about some of the interesting work they've been doing -- but mostly we keep time open for the panel to take questions from attendees, because that's the fun part. Wednesday, October 3rd: 10:00 AM - Tracing Your Java Application Tuning on Oracle Solaris with DTrace(HOL10214, Hilton San Francisco, Franciscan A/B/C/D) This JavaOne hands-on lab will show how to use the DTrace framework to dynamically trace your Java applications on Oracle Solaris and uncover new tuning opportunities. Thursday, October 4th: 12:45 PM - Oracle Solaris 11: Optimized for Oracle Database, Oracle WebLogic Server, and Java(CON8800, Moscone South 252) Explore how Oracle Solaris 11 has been built to be the best platform for the cloud and enterprise applications, with built-in optimizations to improve performance and deliver unique functionality with Oracle Database, Oracle WebLogic Server, and Java.

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  • Are generic keywords in url bad for SEO? [closed]

    - by user1661479
    Possible Duplicate: Squeezing all the SEO out of a URL as possible Need help with url structure. Let's say I'm a manufacturer of Wire EDM machines. Is it bad for me to put the keywords wire-edm in my url to help try to raise SEO ranking? For example: mywebsite.com/wire-edm/machine/model-xxxx mywebsite.com/wire-edm/customer-service mywebsite.com/wire-edm/contact Or should I leave it as the following because the gains are fairly insignificant and it doesn't help users understand my site structure: mywebsite.com/machine/model-xxxx mywebsite.com/customer-service mywebsite.com/contact I’d like to hear what everyones thoughts are on this and please provide some sources for which method is better.

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  • Wire the homepage so that it fires off a Push notification message to my iPhone every time someone l

    - by fwd4
    I looking for a simple way to wire the homepage of my website so that it fires off a Push notification message to my iPhone every time someone lands on the page (just visiting in their browser). I'm aware this could become annoying! I currently send regular notifications to my iPhone using cron and curl to check sites / RSS feeds for change and then fire to to the Prowl API who in turn send it to my iPhone - like so: curl https://prowl.weks.net/publicapi/add -F apikey=$apikey -F priority=$priority -F application="$app" -F event="$eventname" -F description="$description" Could I do something similar from with the HTML of the homepage - call a script on my server which in turn fires a similar curl request above? Maybe with Javascript or PHP? Ideally I'd like the loading and rendering of me webpage to be uninterrupted by the call. Hat tip to Prowl - http://prowl.weks.net/api.php and to flx.me Both of which I use to make what I have already working.

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  • Logs are filling up with httpclient.wire.content dumps. How can I turn it off?

    - by ?????
    My catalina logs are filling up with gobs of statements like: /logs/catalina.out:2010-05-05 02:57:19,611 [Thread-19] DEBUG httpclient.wire.content - >> "[0x4] [0xc][0xd9][0xf4][0xa2]MA[0xed][0xc2][0x93][0x1b][0x15][0xfe],[0xe]h[0xb0][0x1f][0xff][0xd6][0xfb] [0x8f]O[0xd4][0xc4]0[0xab][0x80][0xe8][0xe4][0xf2][\r]I&[0xaa][0xd2]BQ[0xdb](zq[0xcd]ac[0xa8] on and on forever. I searched every config file in both tomcat and apache for the statements that purportedly turn this on as described here: http://hc.apache.org/httpclient-3.x/logging.html And I don't see where this logging as been enabled. No other .war I deployed does this. The log4j configuration block in the app isn't doing it. Any ideas? I'm using an S3 library for grails that may be the source for these. However when I run this application on my development machine (in both develop and deploy configs), I'm not seeing it.

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  • Is sending a hashed password over the wire a security hole?

    - by Ubiquitous Che
    I've come across a system that is in use by a company that we are considering partnering with on a medium-sized (for us, not them) project. They have a web service that we will need to integrate with. My current understanding of proper username/password management is that the username may be stored as plaintext in the database. Every user should have a unique pseudo-random salt, which may also be stored in plaintext. The text of their password must be concatenated with the salt and then this combined string may be hashed and stored in the database in an nvarchar field. So long as passwords are submitted to the website (or web service) over plaintext, everything should be just lovely. Feel free to rip into my understanding as summarized above if I'm wrong. Anyway, back to the subject at hand. The WebService run by this potential partner doesn't accept username and password, which I had anticipated. Instead, it accepts two string fields named 'Username' and 'PasswordHash'. The 'PasswordHash' value that I have been given does indeed look like a hash, and not just a value for a mis-named password field. This is raising a red flag for me. I'm not sure why, but I feel uncomfortable sending a hashed password over the wire for some reason. Off the top of my head I can't think of a reason why this would be a bad thing... Technically, the hash is available on the database anyway. But it's making me nervous, and I'm not sure if there's a reason for this or if I'm just being paranoid.

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  • Is it possible to replace the Logitech G500 wire without rebuying the mouse?

    - by leladax
    It has to be replaced ideally in whole, from the point it starts inside the mouse (with a white 4-5 piece of wires connection) to the end (of the USB connector to the computer) or at least to a considerable length because there is fatigue very near the mouse and the more I fix it there with soldering the closer it gets to being unfixable or reaching towards 'inside' the mouse where fixing it will be hard or impossible. So I wonder if there is a way to get a replacement of the whole thing or at least the inside-the-mouse connector to a certain length. Also I wonder if other mice types are identical in the connector of the inside.

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  • RPi and Java Embedded GPIO: Sensor Connections for Java Enabled Interface

    - by hinkmond
    Now we're ready to connect the hardware needed to make a static electricity sensor for the Raspberry Pi and use Java code to access it through a GPIO port. First, very carefully bend the NTE312 (or MPF-102) transistor "gate" pin (see the diagram on the back of the package or refer to the pin diagram on the Web). You can see it in the inset photo on the bottom left corner. I bent the leftmost pin of the NTE312 transistor as I held the flat part toward me. That is going to be your antenna. So, connect one of the jumper wires to the bent pin. I used the dark green jumper wire (looks almost black; coiled at the bottom) in the photo. Then push the other 2 pins of the transistor into your breadboard. Connect one of the pins to Pin # 1 (3.3V) on the GPIO header of your RPi. See the diagram if you need to glance back at it. In the photo, that's the orange jumper wire. And connect the final unconnected transistor pin to Pin # 22 (GPIO25) on the RPi header. That's the blue jumper wire in my photo. For reference, connect the LED anode (long pin on a common anode LED/short pin on a common cathode LED, check your LED pin diagram) to the same breadboard hole that is connecting to Pin # 22 (same row of holes where the blue wire is connected), and connect the other pin of the LED to GROUND (row of holes that connect to the black wire in the photo). Test by blowing up a balloon, rubbing it on your hair (or your co-worker's hair, if you are hair-challenged) to statically charge it, and bringing it near your antenna (green wire in the photo). The LED should light up when it's near and go off when you pull it away. If you need more static charge, find a co-worker with really long hair, or rub the balloon on a piece of silk (which is just as good but not as fun). Next blog post is where we do some Java coding to access this sensor on your RPi. Finally, back to software! Ha! Hinkmond

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  • Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 3)

    - by hinkmond
    So, let's now connect the parts together to make a Java Embedded ghost sensor using a Raspberry Pi. Grab your JFET transistor, LED light, wires, and breadboard and follow the connections on this diagram. The JFET transistor plugs into the breadboard with the flat part facing left. Then, plug in a wire to the same breadboard hole row as the top JFET lead (green in the diagram) and keep it unconnected to act as an antenna. Then, connect a wire (red) from the middle lead of the JFET transistor to Pin 1 on your RPi GPIO header. And, connect another wire (blue) from the lower lead of the JFET transistor to Pin 25 on your RPi GPIO header, then connect another (blue) wire from the lower lead of the JFET transistor to the long end of a common cathode LED, and finally connect the short end of the LED with a wire (black) to Pin 6 (ground) of the RPi GPIO header. That's it. Easy. Now test it. See: Ghost Sensor Testing Here's a video of me testing the Ghost Sensor circuit on my Raspberry Pi. We'll cover the Java SE app needed to record the ghost analytics in the next post. Hinkmond

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  • How to wire a verifier to a 2.0m5 Restlet using the spring extension and an xml config?

    - by Kevin Pauli
    I can't seem to find any example of how to do this. Imperatively in java it would be a piece of cake of course, but I can't seem to figure out how to inject my JaasVerifier into my SpringComponent declaratively from within the xml. It appears from the method signatures that Verifier is designed to be attached to Context, but the instance of Context itself is created as a side effect of the SpringComponent creation so I can't get a hold of it in Spring. There must be something I am missing.

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  • I wired up a z 80 using telephone wire and put a jump to 0000 0000 0000 0000

    - by john
    I put 1100 0011 0000 0000 0000 0000 in the 2764 eprom --- this is supposed to test the z80 -- I have a 555 timer running at 500 khz. Can this small program work with the z80 ? I looked at the address pins on a m465 oscilloscope. The address shows highs up to 0100 0000. I think it should only count to 0000 0000 0000 0011. Can the z80 be tested? The Santa Clara Valley also made the lm1871 radio control chip that could not show a high or a low without completing the entire rc loop.

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  • C# Is it possible to wire up an event to a method when it is finished?

    - by Martijn
    I have a .dll file and in there, there's a method called A. When I call that method I'd like to call a method of my own, method B. So my question is, is it possible to call method B immediately when method A is finished? Offcourse I can call method A and after that call method B manually. But I was wondering is there a manner to do this automatically, maybe with an event? So when method A is finished the event gets fired somehow and method A is called.

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