Constants (Apache Dubbo 3.1.1 API)

```
public interface Constants
```

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ADMIN_PROTOCOL`
`static String`	`CACHE`
`static String`	`CONDITION_PROTOCOL`
`static String`	`CONFIGURATORS_SUFFIX`
`static String`	`CONSUMER_PROTOCOL`
`static int`	`DEFAULT_ECHO_POLLING_CYCLE` Default value for check frequency: 60000 (ms)
`static String`	`DEFAULT_REGISTRY`
`static int`	`DEFAULT_REGISTRY_RECONNECT_PERIOD`
`static int`	`DEFAULT_REGISTRY_RETRY_PERIOD` Default value for the period of retry interval in milliseconds: 5000
`static int`	`DEFAULT_REGISTRY_RETRY_TIMES` Default value for the times of retry: 3
`static int`	`DEFAULT_SESSION_TIMEOUT`
`static String`	`DUBBO_REGISTRY`
`static String`	`ECHO_POLLING_CYCLE_KEY` To decide the frequency of checking Distributed Service Discovery Registry callback hook (in ms)
`static String`	`ENABLE_CONFIGURATION_LISTEN`
`static String`	`MIGRATION_DELAY_KEY`
`static String`	`MIGRATION_FORCE_KEY`
`static String`	`MIGRATION_PROMOTION_KEY`
`static String`	`MIGRATION_RULE_APPLICATIONS_KEY`
`static String`	`MIGRATION_RULE_DELAY_KEY`
`static String`	`MIGRATION_RULE_FORCE_KEY`
`static String`	`MIGRATION_RULE_INTERFACES_KEY`
`static String`	`MIGRATION_RULE_KEY` MIGRATION_RULE_XXX from remote configuration
`static String`	`MIGRATION_RULE_PROPORTION_KEY`
`static String`	`MIGRATION_RULE_STEP_KEY`
`static String`	`MIGRATION_RULE_THRESHOLD_KEY`
`static String`	`MIGRATION_STEP_KEY`
`static String`	`MIGRATION_THRESHOLD_KEY`
`static String`	`PROVIDER_PROTOCOL`
`static String`	`REGISTER`
`static String`	`REGISTER_IP_KEY`
`static String`	`REGISTER_KEY`
`static String`	`REGISTRY_FILESAVE_SYNC_KEY` To decide whether register center saves file synchronously, the default value is asynchronously
`static String`	`REGISTRY_RECONNECT_PERIOD_KEY` Reconnection period in milliseconds for register center
`static String`	`REGISTRY_RETRY_PERIOD_KEY` Period of registry center's retry interval
`static String`	`REGISTRY_RETRY_TIMES_KEY` Most retry times
`static String`	`SCRIPT_PROTOCOL`
`static String`	`SESSION_TIMEOUT_KEY`
`static String`	`SIMPLIFIED_KEY` simple the registry for provider.
`static String`	`SUBSCRIBE`
`static String`	`SUBSCRIBE_KEY`
`static String`	`TRACE_PROTOCOL`
`static String`	`UNREGISTER`
`static String`	`UNSUBSCRIBE`
`static String`	`USER_HOME`

- Field Detail
  - REGISTER_IP_KEY
```
static final String REGISTER_IP_KEY
```
    See Also:
    
    Constant Field Values
  - REGISTER_KEY
```
static final String REGISTER_KEY
```
    See Also:
    
    Constant Field Values
  - SUBSCRIBE_KEY
```
static final String SUBSCRIBE_KEY
```
    See Also:
    
    Constant Field Values
  - DEFAULT_REGISTRY
```
static final String DEFAULT_REGISTRY
```
    See Also:
    
    Constant Field Values
  - REGISTER
```
static final String REGISTER
```
    See Also:
    
    Constant Field Values
  - UNREGISTER
```
static final String UNREGISTER
```
    See Also:
    
    Constant Field Values
  - SUBSCRIBE
```
static final String SUBSCRIBE
```
    See Also:
    
    Constant Field Values
  - UNSUBSCRIBE
```
static final String UNSUBSCRIBE
```
    See Also:
    
    Constant Field Values
  - CONFIGURATORS_SUFFIX
```
static final String CONFIGURATORS_SUFFIX
```
    See Also:
    
    Constant Field Values
  - ADMIN_PROTOCOL
```
static final String ADMIN_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - PROVIDER_PROTOCOL
```
static final String PROVIDER_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - CONSUMER_PROTOCOL
```
static final String CONSUMER_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - SCRIPT_PROTOCOL
```
static final String SCRIPT_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - CONDITION_PROTOCOL
```
static final String CONDITION_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - TRACE_PROTOCOL
```
static final String TRACE_PROTOCOL
```
    See Also:
    
    Constant Field Values
  - SIMPLIFIED_KEY
```
static final String SIMPLIFIED_KEY
```
    simple the registry for provider.
    
    Since:
    
    2.7.0
    
    See Also:
    
    Constant Field Values
  - REGISTRY_FILESAVE_SYNC_KEY
```
static final String REGISTRY_FILESAVE_SYNC_KEY
```
    To decide whether register center saves file synchronously, the default value is asynchronously
    
    See Also:
    
    Constant Field Values
  - REGISTRY_RECONNECT_PERIOD_KEY
```
static final String REGISTRY_RECONNECT_PERIOD_KEY
```
    Reconnection period in milliseconds for register center
    
    See Also:
    
    Constant Field Values
  - DEFAULT_SESSION_TIMEOUT
```
static final int DEFAULT_SESSION_TIMEOUT
```
    See Also:
    
    Constant Field Values
  - DEFAULT_REGISTRY_RETRY_TIMES
```
static final int DEFAULT_REGISTRY_RETRY_TIMES
```
    Default value for the times of retry: 3
    
    See Also:
    
    Constant Field Values
  - DEFAULT_REGISTRY_RECONNECT_PERIOD
```
static final int DEFAULT_REGISTRY_RECONNECT_PERIOD
```
    See Also:
    
    Constant Field Values
  - DEFAULT_REGISTRY_RETRY_PERIOD
```
static final int DEFAULT_REGISTRY_RETRY_PERIOD
```
    Default value for the period of retry interval in milliseconds: 5000
    
    See Also:
    
    Constant Field Values
  - REGISTRY_RETRY_TIMES_KEY
```
static final String REGISTRY_RETRY_TIMES_KEY
```
    Most retry times
    
    See Also:
    
    Constant Field Values
  - REGISTRY_RETRY_PERIOD_KEY
```
static final String REGISTRY_RETRY_PERIOD_KEY
```
    Period of registry center's retry interval
    
    See Also:
    
    Constant Field Values
  - SESSION_TIMEOUT_KEY
```
static final String SESSION_TIMEOUT_KEY
```
    See Also:
    
    Constant Field Values
  - ECHO_POLLING_CYCLE_KEY
```
static final String ECHO_POLLING_CYCLE_KEY
```
    To decide the frequency of checking Distributed Service Discovery Registry callback hook (in ms)
    
    See Also:
    
    Constant Field Values
  - DEFAULT_ECHO_POLLING_CYCLE
```
static final int DEFAULT_ECHO_POLLING_CYCLE
```
    Default value for check frequency: 60000 (ms)
    
    See Also:
    
    Constant Field Values
  - MIGRATION_STEP_KEY
```
static final String MIGRATION_STEP_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_DELAY_KEY
```
static final String MIGRATION_DELAY_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_FORCE_KEY
```
static final String MIGRATION_FORCE_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_PROMOTION_KEY
```
static final String MIGRATION_PROMOTION_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_THRESHOLD_KEY
```
static final String MIGRATION_THRESHOLD_KEY
```
    See Also:
    
    Constant Field Values
  - ENABLE_CONFIGURATION_LISTEN
```
static final String ENABLE_CONFIGURATION_LISTEN
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_KEY
```
static final String MIGRATION_RULE_KEY
```
    MIGRATION_RULE_XXX from remote configuration
    
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_STEP_KEY
```
static final String MIGRATION_RULE_STEP_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_THRESHOLD_KEY
```
static final String MIGRATION_RULE_THRESHOLD_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_PROPORTION_KEY
```
static final String MIGRATION_RULE_PROPORTION_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_DELAY_KEY
```
static final String MIGRATION_RULE_DELAY_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_FORCE_KEY
```
static final String MIGRATION_RULE_FORCE_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_INTERFACES_KEY
```
static final String MIGRATION_RULE_INTERFACES_KEY
```
    See Also:
    
    Constant Field Values
  - MIGRATION_RULE_APPLICATIONS_KEY
```
static final String MIGRATION_RULE_APPLICATIONS_KEY
```
    See Also:
    
    Constant Field Values
  - USER_HOME
```
static final String USER_HOME
```
    See Also:
    
    Constant Field Values
  - DUBBO_REGISTRY
```
static final String DUBBO_REGISTRY
```
    See Also:
    
    Constant Field Values
  - CACHE
```
static final String CACHE
```
    See Also:
    
    Constant Field Values

Interface Constants

Field Summary

Field Detail

REGISTER_IP_KEY

REGISTER_KEY

SUBSCRIBE_KEY

DEFAULT_REGISTRY

REGISTER

UNREGISTER

SUBSCRIBE

UNSUBSCRIBE

CONFIGURATORS_SUFFIX

ADMIN_PROTOCOL

PROVIDER_PROTOCOL

CONSUMER_PROTOCOL

SCRIPT_PROTOCOL

CONDITION_PROTOCOL

TRACE_PROTOCOL

SIMPLIFIED_KEY

REGISTRY_FILESAVE_SYNC_KEY

REGISTRY_RECONNECT_PERIOD_KEY

DEFAULT_SESSION_TIMEOUT

DEFAULT_REGISTRY_RETRY_TIMES

DEFAULT_REGISTRY_RECONNECT_PERIOD

DEFAULT_REGISTRY_RETRY_PERIOD

REGISTRY_RETRY_TIMES_KEY

REGISTRY_RETRY_PERIOD_KEY

SESSION_TIMEOUT_KEY

ECHO_POLLING_CYCLE_KEY

DEFAULT_ECHO_POLLING_CYCLE

MIGRATION_STEP_KEY

MIGRATION_DELAY_KEY

MIGRATION_FORCE_KEY

MIGRATION_PROMOTION_KEY

MIGRATION_THRESHOLD_KEY

ENABLE_CONFIGURATION_LISTEN

MIGRATION_RULE_KEY

MIGRATION_RULE_STEP_KEY

MIGRATION_RULE_THRESHOLD_KEY

MIGRATION_RULE_PROPORTION_KEY

MIGRATION_RULE_DELAY_KEY

MIGRATION_RULE_FORCE_KEY

MIGRATION_RULE_INTERFACES_KEY

MIGRATION_RULE_APPLICATIONS_KEY

USER_HOME

DUBBO_REGISTRY

CACHE