2 |
|
|
3 |
import java.util.logging.Logger; |
import java.util.logging.Logger; |
4 |
|
|
5 |
|
import dk.thoerup.curcuitbreaker.notification.Notifier; |
6 |
|
import dk.thoerup.curcuitbreaker.notification.NullNotifier; |
7 |
|
|
8 |
/* Simple CircuitBreaker implementation - snipped from http://www.jroller.com/kenwdelong/entry/circuit_breaker_in_java |
/* Simple CircuitBreaker implementation - snipped from http://www.jroller.com/kenwdelong/entry/circuit_breaker_in_java |
9 |
* |
* |
10 |
* example of how it can be used |
* example of how it can be used |
54 |
|
|
55 |
private String name; |
private String name; |
56 |
|
|
57 |
|
private Notifier notifier = new NullNotifier(); |
58 |
|
|
59 |
public CircuitBreaker(String name, int threshold, long timeoutMS) { |
public CircuitBreaker(String name, int threshold, long timeoutMS) { |
60 |
closed.setThreshold(threshold); |
closed.setThreshold(threshold); |
61 |
open.setTimeout(timeoutMS); |
open.setTimeout(timeoutMS); |
87 |
synchronized(this) { |
synchronized(this) { |
88 |
open.trip(); |
open.trip(); |
89 |
currentState = open; |
currentState = open; |
|
|
|
90 |
|
|
91 |
logger.warning("Circuitbreaker tripBreaker - " + name); |
notifier.sendNotification(name, Notifier.Event.BreakerTripped); |
92 |
} |
} |
|
|
|
93 |
} |
} |
94 |
|
|
95 |
public void attemptReset() { |
public void attemptReset() { |
96 |
synchronized(this) { |
synchronized(this) { |
97 |
currentState = halfOpen; |
currentState = halfOpen; |
98 |
|
notifier.sendNotification(name, Notifier.Event.BreakerAttemptReset); |
|
logger.warning("Circuitbreaker attemptReset - " + name); |
|
99 |
} |
} |
100 |
|
|
101 |
} |
} |
102 |
|
|
103 |
public void reset() { |
public void reset() { |
104 |
synchronized(this) { |
synchronized(this) { |
105 |
currentState = closed; |
currentState = closed; |
106 |
|
notifier.sendNotification(name, Notifier.Event.BreakerReset); |
|
logger.warning("Circuitbreaker reset - " + name); |
|
107 |
} |
} |
108 |
} |
} |
109 |
|
|
141 |
return -1; |
return -1; |
142 |
} |
} |
143 |
} |
} |
144 |
|
|
145 |
|
public void setNotifier(Notifier notifier) { |
146 |
|
this.notifier = notifier; |
147 |
|
} |
148 |
|
|
149 |
|
public String getNotifierName() { |
150 |
|
return notifier.toString(); |
151 |
|
} |
152 |
|
|
153 |
} |
} |