Producer Consumer Problem Can Be Solved Using

Producer Consumer Problem Can Be Solved Using-10
The consumer will know when data entered into the buffer for consuming and producer must stop producing when consumption rate is slow and the buffer is filled.To solve producer consumer problem, We need to take care few things like producer stop producing by either go to sleep or discard data.Order: 2 being taken care of with 1 meals also ready.

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In producer method above, the value is initialized as 0.

Inside this method, we have an infinite outer loop which contains synchronized block which ensures that at a time only producer or consumer thread runs.

Order: 10 being taken care of with 1 meals also ready.

Order: 1 being taken care of with 0 meals also ready.

Producer Consumer Problem is a classical concurrency problem and in fact it is one of the concurrency design pattern.

In last article we have seen solving Producer Consumer problem in Java using blocking Queue but one of my reader emailed me and requested code example and explanation of solving Producer Consumer problem in Javawith wait and notify method as well, Since its often asked as one of the top coding question in Java.In the following example I use a C 11 Condition Variable (#include condition_variable), which I find very useful as well as a C 11 mutex.Rather than trying to explain it further I will walk through a simple example.In the example above there clearly is a race, however this is not a race condition.In this case there are no errors due to the threads running out of order and thus there is no issue.The inner loop checks the capacity of a list, if list if full then it gives up the lock on the synchronized block and goes to 3.In consumer method above, we again have an infinite outer loop which checks/consume a value from the list.The easy way we can identify and reduce this problem to a producer-consumer problem is by identifying that we have a limited number of consumers and a infinite number of items being produced.This means we have to use a semaphore in order to keep track of how many produced items are currently being handled by consumers.At the same time this problem is an excellent exercise to understand concept of wait and notify method in Java.In essence, the producer consumer problem occurs in multithreaded processes when there is a limited amount of memory (or memory structure) and therefore there is a fixed amount of space so we must allocate it appropriately.


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