io.nosqlbench.virtdata.library.basics.shared.stateful.Load 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;
@ThreadSafeMapper
@Categories({Category.state})
public class Load implements Function {
private final String name;
private final Function nameFunc;
private final Object defaultValue;
@Example({"Load('foo')","for the current thread, load an Object value from the named variable"})
public Load(String name) {
this.name = name;
this.nameFunc=null;
this.defaultValue=null;
}
@Example({"Load(NumberNameToString())","for the current thread, load an Object value from the named variable, where the variable name is returned by the provided function"})
public Load(Function nameFunc) {
this.name = null;
this.nameFunc = nameFunc;
this.defaultValue=null;
}
@Example({"Load('foo','testvalue')","for the current thread, load an Object value from the named variable, " +
"or the default value if the variable is not yet defined."})
public Load(String name, Object defaultValue) {
this.name = name;
this.nameFunc=null;
this.defaultValue=defaultValue;
}
@Example({"Load(NumberNameToString(),'testvalue')","for the current thread, load an Object value from the named " +
"variable, where the variable name is returned by the provided function, or the" +
"default value if the variable is not yet defined."})
public Load(Function nameFunc, Object defaultValue) {
this.name = null;
this.nameFunc = nameFunc;
this.defaultValue = defaultValue;
}
@Override
public Object apply(Object o) {
String varname = (nameFunc!=null) ? String.valueOf(nameFunc.apply(o)) : name;
HashMap map = SharedState.tl_ObjectMap.get();
Object output = map.getOrDefault(varname,defaultValue);
return output;
}
}