I would like to start loading my truck when the truck arrives at the dock. How could I activate the enter block startloading? When it comes to the block pickupOrders, the truck doesn't load my pallets because I don't know how to activate the block enter "startloading". The source block is part of the agent "truck", the enter block is part of the agent "pallet".
process_logic_simulation
process
As per the Help article, you need to fill the queue for the Pickup block yourself.
Your Enter block cannot create agents that fill up your queue (see the help on what an Enter block does). Replace it with a Source block to actually create agents directly.
If, however, your agents for the queue already exist, you can push them into your Enter block using an Exit block from where they live. In the Exit block "on Exit" code, write myEnterBlock.take(agent) to push them in.
Also, many example models showing you Enter/Exit setup in more detail.
Related
I want to store process times in my model for each agent of type Box. For this purpose I have created a Java class ProcessData.
My problem is that I always get NullPointerExceptions. I don't know if it's because of my code or the functionality of the batch block.
When the wait block reaches a certain size, all agents of type Box are routed to the batch block. The batch agent then waits in the seize block for staff member. If the agent is then seized, each agent of type Box contained in the batch agent should then get a start processing time. This is my code at enter of the delay block: box.getProcessData().add(new ProcessData(date(), duration()));. Using a constructor, I add the start time and duration as new variables to a new ProcessData entry.
To determine the end time of each Box agent I have the following code at unbatch block entry: box.getProcessData().getLast().setEnd(date());
Since I have a NullPointerException I can't tell exactly where it came from. My guess is that I have a bug with addressing the code: should I use agent. (from batch) or box. (name of original agent before batch)? Or is it not possible to give the batch agent properties that are inherited by the box agent?
First error is at unbatch, so the second code from above and second error is the following public void onExit( Box batch, Box agent ) { _unbatch_onExit_xjal( this, batch, agent ); }.
Following the screenshot of my error:
The problem you have with this model first,is that you are seizing a resource for the batch without releasing that resource... you need to release before unbatch
your error nevertheless is related to some code that you wrote in the on exit action of the unbatch block that you are unfortunately not telling us
But to discover what is null, check with a traceln() the value of the variables that are present in the on exit section of the unbatch in order to print on the screen what is null
is there any easy way to detect that agent stopped on a roller conveyor because there are other agents ahead? I tried to use dynamic variable and conditional event but it is consuming too much performence. I don´t want to go for dynamically checking condition (with cyclic event) because I have some bad experience with it.
Thanks!
Try this:
Create a LinkedList<YourAgentType> agentsOnConveyor.
Whenever an agent enters the conveyor, call agentsOnConveyor.addLast(agent). When it leaves, call agentsOnConveyor.removeFirst(agent).
Now you have a linked representation of the agents on the conveyor.
Last, you use the "on stopped" field in the conveyor and pass the message "upstream" through the linked list, i.e. use a for-loop from the first to the last entry and send them a msg "conveyor stopped".
You may still need to check if the individual agent is moving itself or has also stopped, but it might put you on a working path
StopDelay() is not working due to which agent is not able to leave the Delay3 block.
of course your stopDelay won't work because no agent ever reaches delay4
delay3 REQUIRES a call for stopDelay, but there's nothing doing that since the only time stopDelay is called, is further in the flow.
What you need to do instead is on the on enter action of the delay3:
if(delay4.size()==0){
delay3.stopDelay(agent);
}
and on the on exit of the delay4 you do:
if(delay3.size()>0){
delay3.stopDelay(delay3.get(0));
}
I am currently working on a parking place simulation. Before entering the parking place, a car has to cross a border. To simulate that, I added a "carMoveToBorder" block, where the car moves to a stopline. Then I added a service block to simulate the time getting served by the borderService. Now that I am having a car network, I dont really know how to specify the location of the delay or the queue inside the service block. I tried specifying the location of the delay by entering the name of the stopLine but I got an error message saying: Type mismatch: cannot convert from Agent to AnimationStaticLocationProvider
Pictures are below.
Help is appreciated.
Thank you for your time.
borderServicePicture1
borderServicePicture2
why dont you try to use Delay instead of Service. One of the difference between them is that Service has embedded queue. But maybe in your case the car will never use that queue, i mean if its right in front of border but not quite there, it means its still in CarMoveToBorder block. And i guess in Delay you just dont have to set any agent location. (btw, what happens if you leave agent location blank in Service?)
I am building a DES-ABM hybrid model in AnyLogic.
The agents go through the DES blocks, among which multiple Delay blocks.
How do I
access an agent which is in a Delay block
or peferrably
acces the specific agent which triggered the 'on enter' action of the delay block?
My ultimate goal is to open or close a valve object on the agent frame
So can I/ how do I
A. open or close the valve on the agent frame directly form the main/root frame (on which the Delay block is located)
or if that is not possible
B. send a message or trigger a statechart within the specific agent which will then open or close the valve from the agent's own frame?
I have tried to use the 'DelayBlockName'.agents() function, but this does not work and returns [] when I check it using traceln.
access an agent which is in a Delay block or peferrably
use the keyword agent. These keywords differ for different library blocks so best start learning about the lightbulb and how it can help, see here.
acces the specific agent which triggered the 'on enter' action of the delay block?
When you write agent. in the "On enter" block, every agent coming through will execute that code, so by definition, it is always the specific agent :)
My ultimate goal is to open or close a valve object on the agent frame So can I/ how do I A. open or close the valve on the agent frame directly form the main/root frame (on which the Delay block is located) or if that is not possible B. send a message or trigger a statechart within the specific agent which will then open or close the valve from the agent's own frame?
this is something completely different to your original question and just... messy. Please limit questions to 1 topic so it is easy for us to answer :) (see this guide for more)