top collaboration software

, and when it receives a request sent from a client, it processes the request as if it were a resource server that owns the resource. Sometimes the client is unaware that its communication target is a gateway.(2), CharacteristicsGateways work in a very similar mechanism to proxies. The gateway enables the server on the communication line to provide non-HTTP protocol services.Using a gateway can improve the security of the communication because it can be encrypted on the communication line betwee

Consider such a restaurant, it has a chef (chef) and a waiter (waiter). The waiter must wait for the chef to prepare the dishes. When the chef is ready, he notifies the waiter, then the waiter will serve, then return to wait. This is an example of a task collaboration: The chef represents the producer, and the waiter represents the consumer. Both tasks must be shook when the dish is produced and consumed, and the system must be closed in an orderly ma

(Reprinted please indicate the source: http://blog.csdn.net/buptgshengod) 1. Background Java multithreading is widely used, especially in android applications. Asynchronous thread collaboration is the difficulty and the key for multi-thread operations, and is also a frequent place for job interviews. Next I will share my experiences. Several keywords are introduced: Synchronized: thread lock, so that the system only executes the current thread. Yyall

of the dataChannel Channel: two pipes used in a caseTarget Sink: multiple channel-specific　　2. Case StudiesSource:hive.log Channel:file Sink:hdfs3. ConfigurationCP Hive-mem-hdfs.properties Sinks.properties4. Configure Sink.propertiesCreate a new stored file　　Configuration　　5. Effects　　6.flume of Collect　　7. Case StudiesThree machines were launched, of which two were agents and one collect.　　192.168.134.241:collect192.168.134.242:agent192.168.134.243:agent　　8. SituationBecause there is no CDH cl

plate, a thread is blocked, b thread is ready, there is no egg on the plate, a thread is ready, B thread is blocked, the code is as follows:Plate class. Can put, take eggs public class Plate {list　　The program begins, a thread determines whether the plate is empty, puts an egg, and wakes up a thread in the blocking queue, and the blocking queue is empty, assuming that the CPU has dispatched a thread of a, the plate is not empty, execution waits, the a thread enters the blocking queue, then a B

, because in the thread of the Run method is assigned to STR before the operation of 1 seconds sleep, At this point the System.out.println method in the main thread has been executed, so it is difficult to see that the value of str is "Hello word", in order to see the value of str is "Hello word", one of our ideas is to wait for the thread to run after the end, We can do the System.out.println again, when the Join method is shown, we delete the comment code above, and then run, no matter how man

. How to update the database from the background? This is done with the OnPreExecute () function, which at the branch is already at the beginning of the shunt, counted as a sub-thread. The function in this asynctask, to manipulate the database, take away the "token" in the home, that is, some information in the view, the database operation in the Doinbackground function, here is the code part of running the database in the background thread, is related to the actual database Sqliteopenhelper. Th

relevant information. However, it is generally possible to infer by setting a flag bit to change the value of the flag bit before notify. After the Wait () method reads the value of the flag bit to infer, of course, in order to ensure that the Notify is not omitted, we also need another flag bit to loop to infer whether to call the Wait () method.Deep Understanding:Assume that the thread called the object's Wait () method. Then the thread is in the waiting pool for that object. Waiting for a th

, waiting for the thread in the pool to not compete for the lock on the object.When a thread calls the object's Notifyall () method (Wake all wait threads) or the Notify () method (which only randomly wakes up a wait thread), the awakened threads go into the object's lock pool, and the thread in the lock pool competes for that object lock.A high-priority thread competes for the probability of an object lock, and if a thread does not compete with the object lock, it will remain in the lock pool,

which time the CPU is assigned to a, and the value of a cache is 2, and then the B thread acquires execution rights.The 2.B thread also performed steps 1th and 2nd, but before the 3rd step was taken back by a execution, a 2 of the cache was written to the A variable, and a at this time the value is 2.3.A execution, B also grabbed the execution, the problem arises: B The value of the cache is also 2, but it did not re-read the value of a, but instead of a direct implementation of the 3rd step, 2

producer produces the money needs to cycle to determine whether the current warehouse status is full, then the production line needs to wait, release lock allows other synchronization methods to execute.The sample code is as follows:public class Concurrence {public static void main (string[] args) {WareHouse WareHouse = new WareHouse (); Producer Producer = new Producer (wareHouse); Consumer Consumer = new Consumer (wareHouse); new Thread (producer). Start (); new Thread (Consumer). Start ();}

This time finally came up with the solution of the last problem, is to use polymorphic methods, so that creeps, buildings and heroes inherit from the object class, through the pointer to achieve the transmission of information.I also perfected the information for each pane class in the map, including the location information for each lattice, state (including default, walkable, unwalkable), and inclusion (including hero, soldier, building), Now it's time to look at the final UI build.This is a p

1 Piping and redirection 1 in Linux Most of the commands are simple, rarely complex commands, each command is only a simple function, we can combine different commands to achieve complex functions 2 in Linux almost all of the commands returned by the data are plain text, and the majority of the data in plain text is entered in the form of a command More than 3 command collaboration is done through pipelines and redirects. The 4 command line Shell'

, because if you come out after August 21, there is no sense, certainly calculate the project failed. At the same time, we reached a consensus, the Internet product design Agile iterative process, the vast majority of successful products are in the process of continuous improvement mature. If the key objectives of the project are much more, it is likely that one is not well controlled and fails. For example, we often meet the boss in a short period of time to make a good product expectations, t

Collaboration Group member role description Permissions member Management Recycle Bin Content Recovery New Upload Edit Reviews Chat View Group master √ √ √ √ √ √ √ √ Administrator √ √ √ √ √ √ √ √ Edited by √ √ √ √ √ √ NBSP; NBSP, √

the SQL statement, which means that LGWR writes the SQL statement Redolog from log buffer to the redo log file, and redolog the successful write means that the SQL statement was successfully committed. As to whether the buffer that has been modified by this SQL statement has been written back to the data file, there is no necessary connection with whether the SQL statement is committed. So when does dirty buffer write back to the data file? During checkpoint execution, the DBWR process is respo

file for the log output, which is rsyslog to check the size of the file, 2097152 indicates the size threshold of the log file, Xx_log_ Dump.sh represents a script that executes after the log file arrives at a threshold, typically a dump script, separated by a space between the parameters and the program. After this configuration, Rsyslog will be/var/log/audit/from the The log is read in the Audit.log file, and then one by one is written to audit.log.tmp in Syslog, because the date information i

In the last two weeks of May, the National Internet (www. now.cn) has cleared nearly 8,100 sites for spam, based on a list of complaints filed by Castlecops.com. It is reported that Castlecops.com is a volunteer security community, its focus is to promote the Internet more secure, to achieve global Internet agencies to share information, and jointly combat spam sites. All public services provided by the Agency are free of charge, including anti-malware, spam, phishing and other information, an

formats of the picture file Other format of the picture file to borrow Fireworks MX, and how to do it? Very simple! Import a picture, on the Flash MX stage to select the picture, press the Property Panel Edit button, the launch of fireworks MX! If the picture is in the library, select the picture in the library by right-clicking, and select Edit with fireworks from the Drop-down menu. (Of course you can also choose Edit with other graphics processing softw