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feature: fail over from index

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This commit is contained in:
tanyawen01770
2023-01-28 19:53:06 +08:00
parent 77946b2382
commit 0087216c0a
6 changed files with 50 additions and 55 deletions
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src/main/java/org/csource/fastdfs/TrackerClient.java
+33 -24
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@@ -73,7 +73,8 @@ public class TrackerClient {
public Connection getConnection(TrackerServer trackerServer) throws IOException, MyException {
Connection connection = null;
boolean failOver = ClientGlobal.g_fail_over_retry_count > 0 && trackerServer == null;
int length = this.tracker_group.tracker_servers.length;
boolean failOver = length > 1 && trackerServer == null;
try {
if (trackerServer == null) {
trackerServer = getTrackerServer();
@@ -84,42 +85,50 @@ public class TrackerClient {
connection = trackerServer.getConnection();
} catch (IOException e) {
if (failOver) {
System.err.println("default trackerServer get connection error, emsg:" + e.getMessage());
System.err.println("trackerServer get connection error, emsg:" + e.getMessage());
} else {
throw e;
}
} catch (MyException e) {
if (failOver) {
System.err.println("default trackerServer get connection error, emsg:" + e.getMessage());
System.err.println("trackerServer get connection error, emsg:" + e.getMessage());
} else {
throw e;
}
}
if (connection != null || !failOver) {
if (connection != null && !failOver) {
return connection;
}
int retryCount = 0;
while (retryCount++ <= ClientGlobal.g_fail_over_retry_count) {
try {
trackerServer = getTrackerServer();
if (trackerServer == null) {
throw new MyException("tracker server is empty!");
//do fail over
if (length > 1) {
int currentIndex = trackerServer.getIndex();
int failOverCount = 0;
while (failOverCount < length - 1) {
failOverCount++;
currentIndex++;
if (currentIndex >= length) {
currentIndex = 0;
}
return trackerServer.getConnection();
} catch (IOException e) {
if (retryCount <= ClientGlobal.g_fail_over_retry_count) {
//allow retry ignore exception
System.err.println("retry trackerServer get connection error, get connection from next tracker, retryCount:" + retryCount + ",+ emsg:" + e.getMessage());
} else {
throw e;
}
} catch (MyException e) {
if (retryCount <= ClientGlobal.g_fail_over_retry_count) {
System.err.println("trackerServer get connection error, get connection from next tracker, retryCount:" + retryCount + ", emsg:" + e.getMessage());
//allow retry ignore exception
} else {
throw e;
try {
trackerServer = this.tracker_group.getTrackerServer(currentIndex);
if (trackerServer == null) {
throw new MyException("tracker server is empty!");
}
return trackerServer.getConnection();
} catch (IOException e) {
System.err.println("fail over trackerServer get connection error, failOverCount:" + failOverCount + "," + e.getMessage());
if (failOverCount == length - 1) {
throw e;
}
} catch (MyException e) {
System.err.println("fail over trackerServer get connection error, failOverCount:" + failOverCount + ", " + e.getMessage());
if (failOverCount == length - 1) {
throw e;
}
}
}
}
return null;