up. The location of the reason to adjust the configuration of the *.purgatory.purge.interval.requests as small as 100 to solve the problem.
Kafka's research and development team has begun to redesign purgatory to enable request to be removed from the purgatory as soon as complete. Other
Num.partitions:1
#分区数量
queued.max.requests:500
#这个参数是指定用于缓存网络请求的队列的最大容量, this queue will not receive new requests until the upper limit is reached. Generally will not become a bottleneck, unless I/O performanc
Java comes with a GET, POST request:Get Request Method: PackageCom.java;ImportJava.io.BufferedReader;Importjava.io.IOException;ImportJava.io.InputStream;ImportJava.io.InputStreamReader;Importjava.net.MalformedURLException;ImportJava.net.URL;Importjava.net.URLConnection;/*** Java comes with Get request method *@authorYXM **/ Public classHttpGet { Public Static voidMain (string[] args) {NewGet (). Start (); } Static classGetextendsthread{@Override Public voidrun () {Try{URL URL=NewURL ("http://
(httpparams, connect_timeout); // you can specify the read timeout value for httpconnectionparams. setsotimeout (httpparams, read_timeout); schemeregistry registry = new schemeregistry (); registry. register (New Scheme ("HTTP", plainsocketfactory. getsocketfactory (), 80); registry. register (New Scheme ("HTTPS", sslsocketfactory. getsocketfactory (), 443); connectionmanager = new threadsafeclientconnmanager (httpparams, registry);} public static httpclient gethttpclient () {return New default
example assumes that there is a document encoded as utf8,The content contains only one text "simplified"
[Java]
View plaincopyprint?
Import java. Io .*;
Public class main {
Public staticVoid main (string [] ARGs) throws filenotfoundexception, unsupportedencodingexception {
Fileinputstream FCM = new fileinputstream ("D: // desktop // test.txt ");
Try {
Inputstreamreader ISR = new inputstreamreader (FCM, "utf8 ");
Int I;
While (I =
management function of touch screen. Boff: True indicates power off, and false indicates power on. It only calls the ddsitouchpanelpowerhandler () function, which is generated when the function enters or exits the poweroff state.
Touchpanelcalibrationapoint ()
This function is used to calibrate the input touch screen coordinates and convert the touch screen coordinates to the display coordinates, the formula SX = A1 * Tx + B1 * ty + C and SY = a2 * Tx + B2 * ty + C2 are used.
Touchpanelreadcali
inputstreamreader class must be used. The parameters of the filereader constructor are the same as those of fileinputstream, which is a file object or
It indicates the string of path. It can be seen that when you want to read a file based on the file object or string, use filereader; I
I think the role of the filereader subclass lies in this small division of labor.
3) General Usage:
Filereader Fr = new filereader ("ming.txt ");Char [] buffer = new char [1024];Int CH = 0;While (CH = Fr. Read ()
I. Analysis of Typical μC/OS-ⅲ interrupt service programs
In the μC/OS-ⅲ system, a typical example of a kernel involved in the interrupt service program is as follows:
Myisr: (1)
Disable all interrupts; (2)
Save the CPU registers; (3)
Osintnestingctr ++; (4)
If (osintnestingctr = 1) {(5)
Ostcbcurptr-> stkptr = current task's CPU Stack pointer register value;
}
Clear interrupting device; (6)
Re-enable interrupts (optional); (7)
Call User ISR; (8)
Osint
and interrupt vector table in the startup program. How to map an interrupt function in the C language to the interrupt vector table in the Assembly, and an example is as follows:# DEFINE _ isr_startaddress 0xc7fff00 // gcs6: 16 M bit DRAM/SDRAM# Define pisr_eint4567 (* (unsigned *) (_ isr_startaddress + 0x74 )). Macro handler handlelabelSub sp, SP, #4Stmfd SP !, {R0}LDR r0, =/handlelabelLDR r0, [R0]STR r0, [Sp, #4]Ldmfd SP !, {R0, PC}. Endm. TextEntry:B resethandler ......Vector_branch:Ldr pc,
vectortable, they are placed in the ROM at the beginning, which requires them to be moved to the specified position when the system starts up, the following code is intended for this purpose.; Setup the vector area.;; (R8) = PTR to exception Vectors
Add R7, PC, # vectorinstructions-(. + 8)Ldmia R7 !, {R0-r3}; load 4 instructionsStmia R8 !, {R0-r3}; store the 4 vector instructionsLdmia R7 !, {R0-r3}; load 4 instructionsStmia R8 !, {R0-r3}; store the 4 vector instructions
; Convert vectortable to
/*** Server side*/Public class myserver {Public myserver (){Try {// Enable the process to listen on port 9999 of the Local MachineServersocket Ss = new serversocket (9999 );System. Out. println ("I'm a server, listening to port 9999 ");// Wait for the client to connect. This function returns a socket connection. If the client does not connect, it will remain in the waiting state.// The following operations will not continue until the client connects to port 9999.Socket S = ss. Accept ();
// Read
accident on the top, leader failure, you need to choose a new leader from the follower immediatelyThe election is prioritized from the ISR because the follower data in this list is synchronized with the leader, which is selected from among them to ensure that the data is completeBut if unfortunately the follower in the ISR list is not available, it can only be selected from other follower, there is the pos
Headerfile and Examples include FilePrototype statements for functions found within this file.interrupt void Xint1_isr (void);Global variables for this exampleVolatile Uint32 Xint1count;Uint32 Loopcount;#define DELAY 35.700Lvoid Main (void){Step 1. Initialize System Control:PLL, WatchDog, enable peripheral clocksThis example function was found in the Dsp2833x_sysctrl.c file.Initsysctrl ();Step 2. Initalize GPIO:This example function was found in the dsp2833x_gpio.c file andIllustrates how to se
corresponding bit in the interrupt shield register. Such protection is called "device protection ". To implement the semi-nested mode, you need to switch between the two protection modes at the right of the interrupt Entry and Exit:① Exit hard protection when data is not read after the device is protected.② Resume the hard protection of the system before exiting ISR to enable device interruption.The specific implementation process is shown in step 4.
the PC, and its programmability is reflected in those registers located in the well-known ISA memory location. Non-Intel systems, such as alpha AXP-based PCs, are not subject to these architecture constraints and often use different interrupt controllers.
Figure 7.1 shows two eight-bit controllers connected to each other. Each controller has a mask and interrupt Status Register: pic1 and pic2. The two shielded registers are located at isa I/O space 0x21 and 0xa1 respectively, and the status reg
(MDD layer)
Touchpanelpowerhandler (bool boff)
The power management function of touch screen. Boff: True indicates power off, and false indicates power on. It only calls the ddsitouchpanelpowerhandler () function, which is generated when the function enters or exits the poweroff state.
Touchpanelcalibrationapoint ()
This function is used to calibrate the input touch screen coordinates and convert the touch screen coordinates to the display coordinates, the formula SX = A1 * Tx + B1 * ty + C and
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