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package dk.thoerup.circuitbreaker;
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import java.util.*;
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import dk.thoerup.circuitbreaker.notification.*;
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public class LoggingCircuitBreaker extends AccountingCircuitBreaker {
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private LinkedList<LogEntry> log = new LinkedList<LogEntry>();
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final int maxSize = 50;
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public class LogEntry {
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public long time;
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public Notifier.Event event;
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public LogEntry(Notifier.Event evnt) {
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this.event = evnt;
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this.time = System.currentTimeMillis();
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}
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}
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public LoggingCircuitBreaker(String name, int threshold, long timeoutMS) {
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super(name, threshold, timeoutMS);
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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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addEntry(Notifier.Event.BreakerTripped);
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}
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/* don't log retrips - they are not as interesting as trips and resets
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@Override
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public void retripBreaker() {
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super.retripBreaker();
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addEntry(Notifier.Event.BreakerRetripped);
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}
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*/
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@Override
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public void reset() {
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super.reset();
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addEntry(Notifier.Event.BreakerReset);
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}
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private void addEntry(Notifier.Event event) {
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synchronized(this) {
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log.addFirst( new LogEntry(event) );
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if(log.size() > maxSize) {
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log.removeLast();
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}
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}
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}
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public void clearLog() {
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synchronized(this) {
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log.clear();
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}
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}
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public LinkedList<LogEntry> getLog() {
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synchronized(this) {
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return new LinkedList<LogEntry>(log); //return a copy so caller can to whatever he wants, when he wants
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}
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}
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}
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