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package dk.thoerup.circuitbreaker;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicLong;
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public class AccountingCircuitBreaker extends CircuitBreaker {
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private AtomicInteger tripCount = new AtomicInteger(0); // how many times ahs the CB tripped
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private AtomicInteger blockCount = new AtomicInteger(0); //how many times has this CB blocked a call that would otherwise go to the backend
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private AtomicInteger totalFailureCount = new AtomicInteger(0); //how many times has the backend thrown an exception
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private AtomicInteger totalCallCount = new AtomicInteger(0);
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private AtomicLong lastTrip = new AtomicLong(0);
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private AtomicLong lastFailure = new AtomicLong(0);
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private long lastResetCounters = 0;
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public AccountingCircuitBreaker(String name, int threshold, long timeoutMS) {
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super(name, threshold, timeoutMS);
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resetCounters();
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}
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@Override
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public Object invoke(CircuitInvocation invocation) throws Exception {
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Object result;
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try {
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totalCallCount.incrementAndGet();
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result = super.invoke(invocation);
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} catch (Exception e) {
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if (e instanceof CircuitBreakerException) {
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blockCount.incrementAndGet();
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} else {
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totalFailureCount.incrementAndGet();
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lastFailure.set( System.currentTimeMillis() );
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}
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throw e;
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}
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return result;
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}
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@Override
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public void tripBreaker() {
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super.tripBreaker();
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tripCount.incrementAndGet();
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lastTrip.set( System.currentTimeMillis() );
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}
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public int getTripCount() {
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return tripCount.get();
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}
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public int getBlockCount() {
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return blockCount.get();
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}
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public int getTotalFailureCount() {
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return totalFailureCount.get();
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}
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public long getLastResetCounters() {
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return lastResetCounters;
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}
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public long getLastTrip() {
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return lastTrip.get();
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}
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public long getLastFailure() {
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return lastFailure.get();
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}
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public int getTotalCallCount() {
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return totalCallCount.get();
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}
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public void resetCounters() {
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tripCount.set(0);
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blockCount.set(0);
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totalFailureCount.set(0);
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totalCallCount.set(0);
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lastTrip.set(0);
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lastFailure.set(0);
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lastResetCounters = System.currentTimeMillis();
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}
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}
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