Api change affects transaction list queries - reopening issue.
 Reopening issue to add configuration option for the duration determining agent inactivity.

Add time filtering when querying agents for Realtime data
When querying for realtime data such as the active thread chart, servers that are no longer in use are of no interest. These servers are currently displayed as _NOT_FOUND_ and will continue to be displayed until the TTL value set in HBase.

It might be a good idea to set a reasonable time buffer (perhaps a week?) when querying for these agents so that servers that were down for longer than a week does not show up in the active thread chart and confuse everyone.

web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java web/src/main/resources/pinpoint-web.properties
web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java web/src/main/resources/pinpoint-web.properties
diff --git a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java
index 00053762d74e..0112e4e0b42c 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentServiceImpl.java
@@ -48,6 +48,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 
 import java.util.*;
@@ -62,11 +63,10 @@ public class AgentServiceImpl implements AgentService {
 
     private static final long DEFAULT_FUTURE_TIMEOUT = 3000;
 
-    private static final long DEFAULT_TIME_DIFF_DAYS = 7;
-    private static final long DEFAULT_TIME_DIFF_MS = TimeUnit.MILLISECONDS.convert(DEFAULT_TIME_DIFF_DAYS, TimeUnit.DAYS);
-
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+    private long timeDiffMs;
+
     @Autowired
     private AgentInfoService agentInfoService;
 
@@ -79,6 +79,11 @@ public class AgentServiceImpl implements AgentService {
     @Autowired
     private DeserializerFactory<HeaderTBaseDeserializer> commandDeserializerFactory;
 
+    @Value("#{pinpointWebProps['web.activethread.activeAgent.duration.days'] ?: 7}")
+    private void setTimeDiffMs(int durationDays) {
+        this.timeDiffMs = TimeUnit.MILLISECONDS.convert(durationDays, TimeUnit.DAYS);
+    }
+
     @Override
     public AgentInfo getAgentInfo(String applicationName, String agentId) {
         long currentTime = System.currentTimeMillis();
@@ -140,7 +145,7 @@ public AgentInfo getAgentInfo(String applicationName, String agentId, long start
 
     @Override
     public List<AgentInfo> getRecentAgentInfoList(String applicationName) {
-        return this.getRecentAgentInfoList(applicationName, DEFAULT_TIME_DIFF_MS);
+        return this.getRecentAgentInfoList(applicationName, this.timeDiffMs);
     }
 
     @Override
diff --git a/web/src/main/resources/pinpoint-web.properties b/web/src/main/resources/pinpoint-web.properties
index 29fc033e67ce..61153f362543 100644
--- a/web/src/main/resources/pinpoint-web.properties
+++ b/web/src/main/resources/pinpoint-web.properties
@@ -20,3 +20,5 @@ config.editUserInfo=true
 
 web.hbase.selectSpans.limit=500
 web.hbase.selectAllSpans.limit=500
+
+web.activethread.activeAgent.duration.days=7
\ No newline at end of file
