io.nosqlbench.virtdata.library.basics.shared.stateful.LoadLong 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;
/**
* Load a value from a named thread-local variable, where the variable
* name is fixed or a generated variable name from a provided function.
* If the named variable is not defined, then the default value is returned.
*/
@Categories(Category.state)
@ThreadSafeMapper
public class LoadLong implements Function {
private final String name;
private final Function nameFunc;
private long defaultValue;
@Example({"LoadLong('foo',42L)","for the current thread, load a long value from the named variable."})
public LoadLong(String name) {
this.name = name;
this.nameFunc=null;
this.defaultValue=0L;
}
@Example({"LoadLong('foo',42L)","for the current thread, load a long value from the named variable," +
" or the default value if the named variable is not defined."})
public LoadLong(String name, long defaultValue) {
this.name = name;
this.nameFunc=null;
this.defaultValue=defaultValue;
}
@Example({"LoadLong(NumberNameToString(),42L)","for the current thread, load a long value from the named variable," +
"where the variable name is provided by a function."})
public LoadLong(Function nameFunc) {
this.name=null;
this.nameFunc = nameFunc;
this.defaultValue=0L;
}
@Example({"LoadLong(NumberNameToString(),42L)","for the current thread, load a long value from the named variable," +
"where the variable name is provided by a function, or the default value if the named" +
"variable is not defined."})
public LoadLong(Function nameFunc, long defaultValue) {
this.name=null;
this.nameFunc = nameFunc;
this.defaultValue=defaultValue;
}
@Override
public Long apply(Object o) {
String varname=(nameFunc!=null) ? String.valueOf(nameFunc.apply(o)) : name;
HashMap map = SharedState.tl_ObjectMap.get();
Object value = map.getOrDefault(varname,defaultValue);
return (Long) value;
}
}