StringConcatReducer (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.util.lang.gridfunc.StringConcatReducer

All Implemented Interfaces:

Serializable, IgniteReducer<String,String>
```
public class StringConcatReducer
extends Object
implements IgniteReducer<String,String>
```
Reducer that concatenates strings using provided delimiter.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

StringConcatReducer(String delim)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`collect(String s)`	Collects given value.
`String`	`reduce()`	Reduces collected values into one.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - StringConcatReducer
```
public StringConcatReducer(String delim)
```
    Parameters:
    
    delim - Delimiter (optional).
- Method Detail
  - collect
```
public boolean collect(String s)
```
    Collects given value. If this method returns false then IgniteReducer.reduce() will be called right away. Otherwise caller will continue collecting until all values are processed.
    
    Specified by:
    
    collect in interface IgniteReducer<String,String>
    
    Parameters:
    
    s - Value to collect.
    
    Returns:
    
    true to continue collecting, false to instruct caller to stop collecting and call IgniteReducer.reduce() method.
  - reduce
```
public String reduce()
```
    Reduces collected values into one.
    
    Specified by:
    
    reduce in interface IgniteReducer<String,String>
    
    Returns:
    
    Reduced value.
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object