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cloud server for Five Faces

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package com.fivefaces.cloud.workflow.awsonprem.impl;

import com.amazonaws.services.stepfunctions.builder.StateMachine;
import com.fivefaces.cloud.Utils;
import com.fivefaces.cloud.workflow.awsonprem.StateMachineRepo;
import com.fivefaces.common.exception.ItemNotFoundException;
import lombok.RequiredArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
@RequiredArgsConstructor
public class StateMachineRepoImpl implements StateMachineRepo {

    private static final Map MACHINES = new HashMap<>();
    private final Utils utils;

    @Override
    public StateMachine findByName(String functionName) {

        if (functionName.contains("_")) {
            functionName = functionName.substring(functionName.indexOf("_") + 1);
        }
        String machineDefinitions;
        String machineDefinition;

        if (MACHINES.containsKey(functionName)) {
            machineDefinition = MACHINES.get(functionName);
        } else {
            machineDefinitions = utils.getOnPremiseFunctions();
            machineDefinition = utils.parseOnPremiseFunction(machineDefinitions, functionName);
            MACHINES.put(functionName, machineDefinition);
        }

        if (StringUtils.isNotBlank(machineDefinition)) {
            return StateMachine.fromJson(machineDefinition).build();
        }
        throw new ItemNotFoundException(functionName + " is not defined");
    }

}