io.nosqlbench.virtdata.library.basics.shared.stateful.Save Maven / Gradle / Ivy
package io.nosqlbench.virtdata.library.basics.shared.stateful;
import io.nosqlbench.virtdata.api.annotations.Categories;
import io.nosqlbench.virtdata.api.annotations.Category;
import io.nosqlbench.virtdata.api.annotations.Example;
import io.nosqlbench.virtdata.api.annotations.ThreadSafeMapper;
import io.nosqlbench.virtdata.library.basics.core.threadstate.SharedState;
import java.util.HashMap;
import java.util.function.Function;
/**
* Save the current input value at this point in the function chain to a thread-local variable name.
* The input value is unchanged, and available for the next function in the chain to use as-is.
*/
@ThreadSafeMapper
@Categories({Category.state})
public class Save implements Function {
private final String name;
private final Function nameFunc;
@Example({"Save('foo')","for the current thread, save the input object value to the named variable"})
public Save(String name) {
this.name = name;
this.nameFunc=null;
}
@Example({"Save(NumberNameToString())","for the current thread, save the current input object value to the named variable," +
"where the variable name is provided by a function."})
public Save(Function nameFunc) {
this.name = null;
this.nameFunc = nameFunc;
}
@Override
public Object apply(Object o) {
HashMap map = SharedState.tl_ObjectMap.get();
String varname = (nameFunc!=null) ? String.valueOf(nameFunc.apply(o)) : name;
map.put(varname,o);
return o;
}
}