Constants (Apache Dubbo 3.2.5 API)

```
public interface Constants
```

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ACCEPTS_KEY` max size of channel.
`static String`	`APACHE_HTTP_CLIENT`
`static String`	`BIND_IP_KEY`
`static String`	`BIND_PORT_KEY`
`static String`	`BUFFER_KEY`
`static String`	`CHANNEL_ATTRIBUTE_READONLY_KEY`
`static String`	`CHANNEL_READONLYEVENT_SENT_KEY`
`static String`	`CHANNEL_SEND_READONLYEVENT_KEY`
`static String`	`CHANNEL_SHUTDOWN_TIMEOUT_KEY`
`static String`	`CHARSET_KEY`
`static String`	`CHECK_KEY`
`static String`	`CLIENT_KEY`
`static String`	`CLOSE_TIMEOUT_CONFIG_KEY`
`static String`	`CLOSE_TIMEOUT_KEY`
`static String`	`CODEC_KEY`
`static String`	`CODEC_VERSION_KEY`
`static String`	`CONNECT_QUEUE_CAPACITY`
`static String`	`CONNECT_QUEUE_WARNING_SIZE`
`static String`	`CONNECT_TIMEOUT_KEY`
`static String`	`CONNECTION`
`static String`	`CONNECTIONS_KEY`
`static String`	`CONTENT_LENGTH_KEY`
`static int`	`DEFAULT_ACCEPTS`
`static int`	`DEFAULT_BACKLOG`
`static int`	`DEFAULT_BUFFER_SIZE` default buffer size is 8k.
`static String`	`DEFAULT_CHARSET`
`static int`	`DEFAULT_CONNECT_QUEUE_WARNING_SIZE`
`static int`	`DEFAULT_CONNECT_TIMEOUT`
`static String`	`DEFAULT_EXCHANGER`
`static int`	`DEFAULT_HEARTBEAT`
`static int`	`DEFAULT_IDLE_TIMEOUT`
`static int`	`DEFAULT_IO_THREADS`
`static int`	`DEFAULT_PAYLOAD` 8M
`static String`	`DEFAULT_PROMPT`
`static int`	`DEFAULT_RECONNECT_PERIOD`
`static String`	`DEFAULT_REMOTING_CLIENT`
`static String`	`DEFAULT_REMOTING_SERIALIZATION_PROPERTY_KEY`
`static String`	`DEFAULT_TRANSPORTER`
`static String`	`DISPACTHER_KEY`
`static String`	`DISPATCHER_KEY`
`static String`	`EVENT_LOOP_BOSS_POOL_NAME`
`static String`	`EVENT_LOOP_WORKER_POOL_NAME`
`static String`	`EXCHANGER_KEY`
`static int`	`HEARTBEAT_CHECK_TICK` Every heartbeat duration / HEARTBEAT_CHECK_TICK, check if a heartbeat should be sent.
`static String`	`HEARTBEAT_CONFIG_KEY`
`static String`	`HEARTBEAT_KEY`
`static String`	`HEARTBEAT_TIMEOUT_KEY`
`static String`	`IDLE_TIMEOUT_KEY`
`static String`	`IS_PU_SERVER_KEY`
`static String`	`KEEP_ALIVE`
`static String`	`KEEP_ALIVE_HEADER`
`static long`	`LEAST_HEARTBEAT_DURATION` the least heartbeat during is 1000 ms.
`static long`	`LEAST_RECONNECT_DURATION` the least reconnect during is 60000 ms.
`static String`	`LEAST_RECONNECT_DURATION_KEY`
`static int`	`MAX_BUFFER_SIZE`
`static int`	`MIN_BUFFER_SIZE`
`static String`	`NETTY_EPOLL_ENABLE_KEY`
`static String`	`OK_HTTP`
`static String`	`PAYLOAD_KEY`
`static String`	`PREFER_SERIALIZATION_KEY` Prefer serialization
`static String`	`PROMPT_KEY`
`static String`	`RECONNECT_KEY`
`static String`	`SEND_RECONNECT_KEY`
`static String`	`SENT_KEY`
`static String`	`SERIALIZATION_KEY`
`static String`	`SERVER_KEY`
`static String`	`TELNET_KEY`
`static int`	`TICKS_PER_WHEEL` ticks per wheel.
`static String`	`TRANSPORTER_KEY`
`static String`	`URL_CONNECTION`
`static String`	`USE_SECURE_RANDOM_ID`

- Field Detail
  - BUFFER_KEY
```
static final String BUFFER_KEY
```
    See Also:
    
    Constant Field Values
  - DEFAULT_BUFFER_SIZE
```
static final int DEFAULT_BUFFER_SIZE
```
    default buffer size is 8k.
    
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    Constant Field Values
  - MAX_BUFFER_SIZE
```
static final int MAX_BUFFER_SIZE
```
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    Constant Field Values
  - MIN_BUFFER_SIZE
```
static final int MIN_BUFFER_SIZE
```
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    Constant Field Values
  - IDLE_TIMEOUT_KEY
```
static final String IDLE_TIMEOUT_KEY
```
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    Constant Field Values
  - DEFAULT_IDLE_TIMEOUT
```
static final int DEFAULT_IDLE_TIMEOUT
```
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    Constant Field Values
  - ACCEPTS_KEY
```
static final String ACCEPTS_KEY
```
    max size of channel. default value is zero that means unlimited.
    
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    Constant Field Values
  - DEFAULT_ACCEPTS
```
static final int DEFAULT_ACCEPTS
```
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    Constant Field Values
  - CONNECT_QUEUE_CAPACITY
```
static final String CONNECT_QUEUE_CAPACITY
```
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    Constant Field Values
  - CONNECT_QUEUE_WARNING_SIZE
```
static final String CONNECT_QUEUE_WARNING_SIZE
```
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    Constant Field Values
  - DEFAULT_CONNECT_QUEUE_WARNING_SIZE
```
static final int DEFAULT_CONNECT_QUEUE_WARNING_SIZE
```
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    Constant Field Values
  - CHARSET_KEY
```
static final String CHARSET_KEY
```
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    Constant Field Values
  - DEFAULT_CHARSET
```
static final String DEFAULT_CHARSET
```
    See Also:
    
    Constant Field Values
  - HEARTBEAT_CHECK_TICK
```
static final int HEARTBEAT_CHECK_TICK
```
    Every heartbeat duration / HEARTBEAT_CHECK_TICK, check if a heartbeat should be sent. Every heartbeat timeout duration / HEARTBEAT_CHECK_TICK, check if a connection should be closed on server side, and if reconnect on client side
    
    See Also:
    
    Constant Field Values
  - LEAST_HEARTBEAT_DURATION
```
static final long LEAST_HEARTBEAT_DURATION
```
    the least heartbeat during is 1000 ms.
    
    See Also:
    
    Constant Field Values
  - LEAST_RECONNECT_DURATION
```
static final long LEAST_RECONNECT_DURATION
```
    the least reconnect during is 60000 ms.
    
    See Also:
    
    Constant Field Values
  - LEAST_RECONNECT_DURATION_KEY
```
static final String LEAST_RECONNECT_DURATION_KEY
```
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    Constant Field Values
  - TICKS_PER_WHEEL
```
static final int TICKS_PER_WHEEL
```
    ticks per wheel.
    
    See Also:
    
    Constant Field Values
  - PAYLOAD_KEY
```
static final String PAYLOAD_KEY
```
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    Constant Field Values
  - DEFAULT_PAYLOAD
```
static final int DEFAULT_PAYLOAD
```
    8M
    
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    Constant Field Values
  - CONNECT_TIMEOUT_KEY
```
static final String CONNECT_TIMEOUT_KEY
```
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    Constant Field Values
  - DEFAULT_CONNECT_TIMEOUT
```
static final int DEFAULT_CONNECT_TIMEOUT
```
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    Constant Field Values
  - SERIALIZATION_KEY
```
static final String SERIALIZATION_KEY
```
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    Constant Field Values
  - PREFER_SERIALIZATION_KEY
```
static final String PREFER_SERIALIZATION_KEY
```
    Prefer serialization
    
    See Also:
    
    Constant Field Values
  - DEFAULT_REMOTING_SERIALIZATION_PROPERTY_KEY
```
static final String DEFAULT_REMOTING_SERIALIZATION_PROPERTY_KEY
```
    See Also:
    
    Constant Field Values
  - CODEC_KEY
```
static final String CODEC_KEY
```
    See Also:
    
    Constant Field Values
  - CODEC_VERSION_KEY
```
static final String CODEC_VERSION_KEY
```
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    Constant Field Values
  - SERVER_KEY
```
static final String SERVER_KEY
```
    See Also:
    
    Constant Field Values
  - IS_PU_SERVER_KEY
```
static final String IS_PU_SERVER_KEY
```
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    Constant Field Values
  - CLIENT_KEY
```
static final String CLIENT_KEY
```
    See Also:
    
    Constant Field Values
  - DEFAULT_REMOTING_CLIENT
```
static final String DEFAULT_REMOTING_CLIENT
```
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    Constant Field Values
  - TRANSPORTER_KEY
```
static final String TRANSPORTER_KEY
```
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    Constant Field Values
  - DEFAULT_TRANSPORTER
```
static final String DEFAULT_TRANSPORTER
```
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    Constant Field Values
  - EXCHANGER_KEY
```
static final String EXCHANGER_KEY
```
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    Constant Field Values
  - DEFAULT_EXCHANGER
```
static final String DEFAULT_EXCHANGER
```
    See Also:
    
    Constant Field Values
  - DISPACTHER_KEY
```
static final String DISPACTHER_KEY
```
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    Constant Field Values
  - DEFAULT_IO_THREADS
```
static final int DEFAULT_IO_THREADS
```
  - EVENT_LOOP_BOSS_POOL_NAME
```
static final String EVENT_LOOP_BOSS_POOL_NAME
```
    See Also:
    
    Constant Field Values
  - EVENT_LOOP_WORKER_POOL_NAME
```
static final String EVENT_LOOP_WORKER_POOL_NAME
```
    See Also:
    
    Constant Field Values
  - NETTY_EPOLL_ENABLE_KEY
```
static final String NETTY_EPOLL_ENABLE_KEY
```
    See Also:
    
    Constant Field Values
  - BIND_IP_KEY
```
static final String BIND_IP_KEY
```
    See Also:
    
    Constant Field Values
  - BIND_PORT_KEY
```
static final String BIND_PORT_KEY
```
    See Also:
    
    Constant Field Values
  - SENT_KEY
```
static final String SENT_KEY
```
    See Also:
    
    Constant Field Values
  - DISPATCHER_KEY
```
static final String DISPATCHER_KEY
```
    See Also:
    
    Constant Field Values
  - CHANNEL_ATTRIBUTE_READONLY_KEY
```
static final String CHANNEL_ATTRIBUTE_READONLY_KEY
```
    See Also:
    
    Constant Field Values
  - CHANNEL_READONLYEVENT_SENT_KEY
```
static final String CHANNEL_READONLYEVENT_SENT_KEY
```
    See Also:
    
    Constant Field Values
  - CHANNEL_SEND_READONLYEVENT_KEY
```
static final String CHANNEL_SEND_READONLYEVENT_KEY
```
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    Constant Field Values
  - RECONNECT_KEY
```
static final String RECONNECT_KEY
```
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    Constant Field Values
  - DEFAULT_RECONNECT_PERIOD
```
static final int DEFAULT_RECONNECT_PERIOD
```
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    Constant Field Values
  - CHANNEL_SHUTDOWN_TIMEOUT_KEY
```
static final String CHANNEL_SHUTDOWN_TIMEOUT_KEY
```
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    Constant Field Values
  - SEND_RECONNECT_KEY
```
static final String SEND_RECONNECT_KEY
```
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    Constant Field Values
  - CHECK_KEY
```
static final String CHECK_KEY
```
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    Constant Field Values
  - PROMPT_KEY
```
static final String PROMPT_KEY
```
    See Also:
    
    Constant Field Values
  - DEFAULT_PROMPT
```
static final String DEFAULT_PROMPT
```
    See Also:
    
    Constant Field Values
  - TELNET_KEY
```
static final String TELNET_KEY
```
    See Also:
    
    Constant Field Values
  - HEARTBEAT_KEY
```
static final String HEARTBEAT_KEY
```
    See Also:
    
    Constant Field Values
  - HEARTBEAT_CONFIG_KEY
```
static final String HEARTBEAT_CONFIG_KEY
```
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    Constant Field Values
  - CLOSE_TIMEOUT_CONFIG_KEY
```
static final String CLOSE_TIMEOUT_CONFIG_KEY
```
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    Constant Field Values
  - DEFAULT_HEARTBEAT
```
static final int DEFAULT_HEARTBEAT
```
    See Also:
    
    Constant Field Values
  - HEARTBEAT_TIMEOUT_KEY
```
static final String HEARTBEAT_TIMEOUT_KEY
```
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    Constant Field Values
  - CLOSE_TIMEOUT_KEY
```
static final String CLOSE_TIMEOUT_KEY
```
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    Constant Field Values
  - CONNECTIONS_KEY
```
static final String CONNECTIONS_KEY
```
    See Also:
    
    Constant Field Values
  - DEFAULT_BACKLOG
```
static final int DEFAULT_BACKLOG
```
    See Also:
    
    Constant Field Values
  - CONNECTION
```
static final String CONNECTION
```
    See Also:
    
    Constant Field Values
  - KEEP_ALIVE
```
static final String KEEP_ALIVE
```
    See Also:
    
    Constant Field Values
  - KEEP_ALIVE_HEADER
```
static final String KEEP_ALIVE_HEADER
```
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    Constant Field Values
  - OK_HTTP
```
static final String OK_HTTP
```
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    Constant Field Values
  - URL_CONNECTION
```
static final String URL_CONNECTION
```
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    Constant Field Values
  - APACHE_HTTP_CLIENT
```
static final String APACHE_HTTP_CLIENT
```
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    Constant Field Values
  - CONTENT_LENGTH_KEY
```
static final String CONTENT_LENGTH_KEY
```
    See Also:
    
    Constant Field Values
  - USE_SECURE_RANDOM_ID
```
static final String USE_SECURE_RANDOM_ID
```
    See Also:
    
    Constant Field Values

Interface Constants

Field Summary

Field Detail

BUFFER_KEY

DEFAULT_BUFFER_SIZE

MAX_BUFFER_SIZE

MIN_BUFFER_SIZE

IDLE_TIMEOUT_KEY

DEFAULT_IDLE_TIMEOUT

ACCEPTS_KEY

DEFAULT_ACCEPTS

CONNECT_QUEUE_CAPACITY

CONNECT_QUEUE_WARNING_SIZE

DEFAULT_CONNECT_QUEUE_WARNING_SIZE

CHARSET_KEY

DEFAULT_CHARSET

HEARTBEAT_CHECK_TICK

LEAST_HEARTBEAT_DURATION

LEAST_RECONNECT_DURATION

LEAST_RECONNECT_DURATION_KEY

TICKS_PER_WHEEL

PAYLOAD_KEY

DEFAULT_PAYLOAD

CONNECT_TIMEOUT_KEY

DEFAULT_CONNECT_TIMEOUT

SERIALIZATION_KEY

PREFER_SERIALIZATION_KEY

DEFAULT_REMOTING_SERIALIZATION_PROPERTY_KEY

CODEC_KEY

CODEC_VERSION_KEY

SERVER_KEY

IS_PU_SERVER_KEY

CLIENT_KEY

DEFAULT_REMOTING_CLIENT

TRANSPORTER_KEY

DEFAULT_TRANSPORTER

EXCHANGER_KEY

DEFAULT_EXCHANGER

DISPACTHER_KEY

DEFAULT_IO_THREADS

EVENT_LOOP_BOSS_POOL_NAME

EVENT_LOOP_WORKER_POOL_NAME

NETTY_EPOLL_ENABLE_KEY

BIND_IP_KEY

BIND_PORT_KEY

SENT_KEY

DISPATCHER_KEY

CHANNEL_ATTRIBUTE_READONLY_KEY

CHANNEL_READONLYEVENT_SENT_KEY

CHANNEL_SEND_READONLYEVENT_KEY

RECONNECT_KEY

DEFAULT_RECONNECT_PERIOD

CHANNEL_SHUTDOWN_TIMEOUT_KEY

SEND_RECONNECT_KEY

CHECK_KEY

PROMPT_KEY

DEFAULT_PROMPT

TELNET_KEY

HEARTBEAT_KEY

HEARTBEAT_CONFIG_KEY

CLOSE_TIMEOUT_CONFIG_KEY

DEFAULT_HEARTBEAT

HEARTBEAT_TIMEOUT_KEY

CLOSE_TIMEOUT_KEY

CONNECTIONS_KEY

DEFAULT_BACKLOG

CONNECTION

KEEP_ALIVE

KEEP_ALIVE_HEADER

OK_HTTP

URL_CONNECTION

APACHE_HTTP_CLIENT

CONTENT_LENGTH_KEY

USE_SECURE_RANDOM_ID