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package net.admin4j.ui.filters; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.StringTokenizer; |
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import javax.servlet.FilterChain; |
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import javax.servlet.FilterConfig; |
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import javax.servlet.ServletException; |
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import javax.servlet.ServletRequest; |
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import javax.servlet.ServletResponse; |
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import net.admin4j.config.Admin4JConfiguration; |
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import net.admin4j.monitor.ConcurrentUsageDetector; |
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import net.admin4j.util.Daemon; |
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40 | 9 | public class ConcurrentUsageFilter extends BaseNotificationFilter { |
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@SuppressWarnings("unused") |
43 | 9 | private Daemon concurrentUsageDaemon = null; |
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private ConcurrentUsageDetector concurrentUsageDetector; |
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public void destroy() { |
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49 | 0 | } |
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public void doFilter(ServletRequest request, ServletResponse response, |
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FilterChain chain) throws IOException, ServletException { |
53 | 6 | concurrentUsageDetector.increment(); |
54 | 6 | try {chain.doFilter(request, response);} |
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finally { |
56 | 6 | concurrentUsageDetector.decrement(); |
57 | 6 | } |
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59 | 6 | } |
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public void init(FilterConfig config) throws ServletException { |
62 | 6 | super.init(config); |
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64 | 6 | long sleepIntervalMillis = ConcurrentUsageDetector.DEFAULT_SLEEP_INTERVAL; |
65 | 6 | Integer[] thresholdLevels = ConcurrentUsageDetector.DEFAULT_ALERT_LEVELS; |
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67 | 6 | String sleepIntervalMillisStr = config.getInitParameter("sleep.interval.millis"); |
68 | 6 | if (sleepIntervalMillisStr != null) { |
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try { |
70 | 3 | sleepIntervalMillis = Long.parseLong(sleepIntervalMillisStr); |
71 | 0 | } catch (Exception e) { |
72 | 0 | sleepIntervalMillis = ConcurrentUsageDetector.DEFAULT_SLEEP_INTERVAL; |
73 | 0 | this.logger.error("Invalid sleep.interval.millis parameter for ConcurrentUsageFilter. Default used. sleep.interval.millis="+ sleepIntervalMillisStr, |
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e); |
75 | 3 | } |
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} |
77 | 3 | else if ( Admin4JConfiguration.getConcurrentUsageSleepIntervalMillis() != null ) { |
78 | 0 | sleepIntervalMillis = Admin4JConfiguration.getConcurrentUsageSleepIntervalMillis(); |
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} |
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81 | 6 | String alertLevelsStr = config.getInitParameter("alert.levels"); |
82 | 6 | if (alertLevelsStr != null) { |
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try { |
84 | 3 | StringTokenizer token = new StringTokenizer(alertLevelsStr, ","); |
85 | 3 | List<Integer> list = new ArrayList<Integer>(); |
86 | 6 | while (token.hasMoreTokens()) { |
87 | 3 | list.add(Integer.valueOf(token.nextToken().trim())); |
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} |
89 | 3 | thresholdLevels = list.toArray(new Integer[0]); |
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} |
91 | 0 | catch (Exception e) { |
92 | 0 | thresholdLevels = ConcurrentUsageDetector.DEFAULT_ALERT_LEVELS; |
93 | 0 | this.logger.error("Invalid alert.levels parameter for ConcurrentUsageFilter. Default used. alert.levels="+ alertLevelsStr, |
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e); |
95 | 3 | } |
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} |
98 | 3 | else if ( Admin4JConfiguration.getConcurrentUsageAlertLevels() != null ) { |
99 | 0 | thresholdLevels = Admin4JConfiguration.getConcurrentUsageAlertLevels(); |
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} |
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102 | 6 | concurrentUsageDetector = new ConcurrentUsageDetector(this.notifier, thresholdLevels); |
103 | 6 | concurrentUsageDaemon = new Daemon(concurrentUsageDetector, "Admin4j Concurrent Usage Detector", sleepIntervalMillis); |
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105 | 6 | } |
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} |