public class InMemoryConfigurationStore extends YarnConfigurationStore
YarnConfigurationStore
. Doesn't offer
persistent configuration storage, just stores the configuration in memory.LOG
Constructor and Description |
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InMemoryConfigurationStore() |
Modifier and Type | Method and Description |
---|---|
void |
checkVersion() |
void |
confirmMutation(boolean isValid)
Should be called after
logMutation . |
List<org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation> |
getConfirmedConfHistory(long fromId)
Get a list of confirmed configuration mutations starting from a given id.
|
org.apache.hadoop.yarn.server.records.Version |
getConfStoreVersion()
Get schema version of persisted conf store, for detecting compatibility
issues when changing conf store schema.
|
org.apache.hadoop.yarn.server.records.Version |
getCurrentVersion()
Get the hard-coded schema version, for comparison against the schema
version currently persisted.
|
void |
initialize(org.apache.hadoop.conf.Configuration conf,
org.apache.hadoop.conf.Configuration schedConf,
RMContext rmContext)
Initialize the configuration store, with schedConf as the initial
scheduler configuration.
|
void |
logMutation(org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation logMutation)
Logs the configuration change to backing store.
|
org.apache.hadoop.conf.Configuration |
retrieve()
Retrieve the persisted configuration.
|
void |
storeVersion()
Persist the hard-coded schema version to the conf store.
|
close
public void initialize(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.conf.Configuration schedConf, RMContext rmContext)
YarnConfigurationStore
initialize
in class YarnConfigurationStore
conf
- configuration to initialize store withschedConf
- Initial key-value scheduler configuration to persist.rmContext
- RMContext for this configuration storepublic void logMutation(org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation logMutation)
YarnConfigurationStore
logMutation
in class YarnConfigurationStore
logMutation
- configuration change to be persisted in write ahead logpublic void confirmMutation(boolean isValid)
YarnConfigurationStore
logMutation
. Gets the pending mutation
last logged by logMutation
and marks the mutation as persisted (no
longer pending). If isValid is true, merge the mutation with the persisted
configuration.confirmMutation
in class YarnConfigurationStore
isValid
- if true, update persisted configuration with pending
mutation.public org.apache.hadoop.conf.Configuration retrieve()
YarnConfigurationStore
retrieve
in class YarnConfigurationStore
public List<org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation> getConfirmedConfHistory(long fromId)
YarnConfigurationStore
getConfirmedConfHistory
in class YarnConfigurationStore
fromId
- id from which to start getting mutations, inclusivepublic org.apache.hadoop.yarn.server.records.Version getConfStoreVersion() throws Exception
YarnConfigurationStore
getConfStoreVersion
in class YarnConfigurationStore
Exception
- On version fetch failurepublic void storeVersion() throws Exception
YarnConfigurationStore
storeVersion
in class YarnConfigurationStore
Exception
- On storage failurepublic org.apache.hadoop.yarn.server.records.Version getCurrentVersion()
YarnConfigurationStore
getCurrentVersion
in class YarnConfigurationStore
public void checkVersion()
checkVersion
in class YarnConfigurationStore
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