Package org.apache.druid.common.config

Class JacksonConfigManager

java.lang.Object

org.apache.druid.common.config.JacksonConfigManager

public class JacksonConfigManager
extends Object

Constructor Summary

Constructors

Constructor	Description
JacksonConfigManager(ConfigManager configManager, com.fasterxml.jackson.databind.ObjectMapper jsonMapper, AuditManager auditManager)

Method Summary

Modifier and Type	Method	Description
<T> T	convertByteToConfig(byte[] configInByte, Class<? extends T> clazz, T defaultVal)
<T> ConfigManager.SetResult	set(String key, byte[] oldValue, T newValue, AuditInfo auditInfo)	Set the config and add audit entry
<T> ConfigManager.SetResult	set(String key, T val, AuditInfo auditInfo)	Set the config and add audit entry
<T> AtomicReference<T>	watch(String key, com.fasterxml.jackson.core.type.TypeReference<T> clazz, T defaultVal)
<T> AtomicReference<T>	watch(String key, Class<? extends T> clazz)
<T> AtomicReference<T>	watch(String key, Class<? extends T> clazz, T defaultVal)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JacksonConfigManager

@Inject
public JacksonConfigManager(ConfigManager configManager,
 com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
 AuditManager auditManager)

Method Details

watch

public <T> AtomicReference<T> watch(String key,
 Class<? extends T> clazz)

watch

public <T> AtomicReference<T> watch(String key,
 Class<? extends T> clazz,
 T defaultVal)

watch

public <T> AtomicReference<T> watch(String key,
 com.fasterxml.jackson.core.type.TypeReference<T> clazz,
 T defaultVal)

convertByteToConfig

public <T> T convertByteToConfig(byte[] configInByte,
 Class<? extends T> clazz,
 T defaultVal)

set

public <T> ConfigManager.SetResult set(String key,
 T val,
 AuditInfo auditInfo)

Set the config and add audit entry

Parameters:

key - of the config to set

val - new config value to insert

auditInfo - metadata regarding the change to config, for audit purposes

set

public <T> ConfigManager.SetResult set(String key,
 @Nullable
 byte[] oldValue,
 T newValue,
 AuditInfo auditInfo)

Set the config and add audit entry

Parameters:

key - of the config to set

oldValue - old config value. If not null, then the update will only succeed if the insert happens when current database entry is the same as this value. Note that the current database entry (in array of bytes) have to be exactly the same as the array of bytes of this value for update to succeed. If null, then the insert will not consider the current database entry. Note that this field intentionally uses byte array to be resilient across serde of existing data retrieved from the database (instead of Java object which may have additional fields added as a result of serde)

newValue - new config value to insert

auditInfo - metadata regarding the change to config, for audit purposes