Here is an example of a class using DefaultInvocationGate in Logback:

import ch.qos.logback.core.spi.ContextAware;
import ch.qos.logback.core.spi.DefaultInvocationGate;
import ch.qos.logback.core.spi.InvocationGate;

public class MyClass implements ContextAware {

    private InvocationGate invocationGate;

    public MyClass() {
        invocationGate = new DefaultInvocationGate();
    }

    public void doSomething() {
        if (invocationGate.tryOnFirstTimeOnly()) {
            // do something
        }
    }
    @Override
    public void setContext(Context context) {
        invocationGate.setContext(context);
    }
    @Override
    public Context getContext() {
        return invocationGate.getContext();
    }
}

This class is an example of using DefaultInvocationGate in Logback. DefaultInvocationGate is an implementation of the InvocationGate interface that provides a way to execute code only once. InvocationGate is a mechanism to ensure that certain parts of the code are executed only once, or at a specific rate.

In this example, MyClass has a constructor that initializes a DefaultInvocationGate object, and a doSomething method that use the tryOnFirstTimeOnly() method of the DefaultInvocationGate class. The tryOnFirstTimeOnly() method returns true the first time it's called and false on subsequent calls, this allows to execute the code inside the if statement only once.

It is important to note that DefaultInvocationGate is an implementation of the InvocationGate interface that provides a way to execute code only once. It's used to ensure that certain parts of the code are

Here is an example of how the DefaultInvocationGate class from the logback library can be used:

import ch.qos.logback.core.util.InvocationGate;

public class MyClass {
    private static final InvocationGate gate = new DefaultInvocationGate(1000, 60000);

    public void myMethod() {
        if (!gate.skipFurtherWork()) {
            // do some work
            gate.update();
        }
    }
}

In this example, MyClass uses an instance of DefaultInvocationGate to limit the number of times myMethod is invoked. The skipFurtherWork method returns true if the number of invocations in the last 60 seconds exceeds 1000. The update method should be called after the work is done.

You can also use setTimeWindow to set time window of the gate.

private static final InvocationGate gate = new DefaultInvocationGate(1000, 60000);
gate.setTimeWindow(120000);

This will set the time window to 120 seconds.