当前位置：网站首页>[in depth understanding of tcallusdb technology] description of data interface of designated location in replacement list - [list table]

[in depth understanding of tcallusdb technology] description of data interface of designated location in replacement list - [list table]

2022-04-22 15:11:00 【Database master】

Abstract

Implement the specified in the replacement table Key Data at the specified location in the list of .

Sample code

See Chapter... For synchronous call ：[List surface ] Sample code for replacing location data specified in the list .

See Chapter... For asynchronous call ： Asynchronous call interface sample code .

Request Object method description

notes ： If not listed Request Object methods , This means that this method is invalid in the scenario of replacing data .

Method signature	Method statement
`void setCmd(int cmd)`	Set request type （ Instructions ）.cmd： Request type , Fixed for TcaplusProtocolCsConstants.TCAPLUS_CMD_LIST_REPLACE_REQ.
`void setTableName(String tableName)`	Set the target table name .tableName： Target table name , Not for null.
`Record addRecord(int index)`	Get data objects （Record）, Used to set the data to be updated Key New Value value , The user can call the... Of the object setKeyXXX Method to set each Key Value of field , adopt setValueXXX Set each Value New value for field .index： The sequence number of the data to be read in the list , from 0 Start , It can't be negative .

Request Medium Record Object method description

notes ： If not listed Record Object methods , This means that this method is invalid in the scenario of replacing data .

Method signature	Method statement
`void setVersion(int version)`	Set the version number of the record .version： If it is set to a negative number , Indicates that the current data does not start version control .
`void setKeyByte(String fieldName, byte value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of byte When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyShort(String fieldName, short value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of short When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyInt(String fieldName, int value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of int When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyLong(String fieldName, long value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of long When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyFloat(String fieldName, float value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of float When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyDouble(String fieldName, double value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of double When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyString(String fieldName, String value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of String When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setKeyBlob(String fieldName, byte[] value)`	Sets the of the specified name Key Value of field . Be careful ： When TDR The table describes the field types and defined in the file Java Of byte[] When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueByte(String fieldName, byte value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of byte When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueShort(String fieldName, short value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of short When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueInt(String fieldName, int value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of int When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueLong(String fieldName, long value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of long When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueFloat(String fieldName, float value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of float When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueDouble(String fieldName, double value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of double When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueString(String fieldName, String value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of String When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .
`void setValueBlob(String fieldName, byte[] value)`	Sets the of the specified name Value New value for field . Be careful ： When TDR The table describes the field types and defined in the file Java Of byte[] When type corresponds , This method can be called to set the field value , Otherwise, the server will have parameter errors when processing the request . See TDR Table field type and Java Type correspondence .fieldName： Field name , Do not for null.value： New value for field .

Response Object method description

notes ： If not listed Response Object methods , This means that this method is invalid in the scenario of replacing data .

Method signature	Method statement
`int getResult()`	Get the response code of the replacement data request .0 Indicates the operation is successful . Not 0 Indicates that the operation is abnormal , See Description of the meaning of the response code .

TcaplusDB It's a distributed product of Tencent NoSQL database , The code for storage and scheduling is completely self-developed . With cache + Landing fusion architecture 、PB Levels of storage 、 Millisecond delay 、 Lossless horizontal expansion and complex data structure . At the same time, it has rich ecological environment 、 Easy migration 、 Extremely low operation and maintenance costs and five nine high availability features . Customer coverage game 、 Internet 、 government affairs 、 Finance 、 Manufacturing and the Internet of things .

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