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java.lang.Object com.atomikos.util.UniqueIdMgr
public class UniqueIdMgr
For managing a set of unique IDs on behalf of a given server
Constructor Summary | |
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UniqueIdMgr(String server)
Generate a new instance for a given server. |
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UniqueIdMgr(String server,
String directorypath)
Preferred constructor: based on file-logged epoch value. |
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UniqueIdMgr(String server,
String directorypath,
int limit)
Constructor for startup limit. |
Method Summary | |
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String |
get()
The main way of obtaining a new UniqueId. |
int |
getMaxIdLengthInBytes()
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protected long |
readEpoch()
Read the next epoch value from the epoch file. |
void |
setPrefix(String prefix)
Sets the prefix to add to each generated ID. |
void |
setSuffix(String suffix)
Sets the suffix to add to each generated ID. |
protected void |
writeEpoch(long value)
Write the given value into the epoch file. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public UniqueIdMgr(String server)
public UniqueIdMgr(String server, String directorypath)
server
- The server's unique name.directorypath
- The path (with ending slash!) where the epoch
file should be written.public UniqueIdMgr(String server, String directorypath, int limit)
Method Detail |
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public void setSuffix(String suffix)
suffix
- The suffix, defaults to empty string.
This suffix is added directly after the server (base) name
but is not the last part of the ID.public void setPrefix(String prefix)
prefix
- The prefix, defaults to empty string.
This value is added at the very beginning of each
generated ID.protected long readEpoch() throws IOException
IOException
- If reading or writing fails.protected void writeEpoch(long value) throws IOException
value
- The next epoch value.
IOException
- On failure.public String get()
public int getMaxIdLengthInBytes()
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