org.apache.nifi.snmp.utils.JsonFileUsmReader Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.snmp.utils;
import com.fasterxml.jackson.core.JsonProcessingException;
import org.apache.nifi.processor.exception.ProcessException;
import org.snmp4j.security.UsmUser;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.List;
import java.util.Scanner;
public class JsonFileUsmReader implements UsmReader {
private final String usmUsersFilePath;
public JsonFileUsmReader(String usmUsersFilePath) {
this.usmUsersFilePath = usmUsersFilePath;
}
@Override
public List readUsm() {
final List userDetails;
try (Scanner scanner = new Scanner(new File(usmUsersFilePath))) {
final String content = scanner.useDelimiter("\\Z").next();
userDetails = UsmJsonParser.parse(content);
} catch (FileNotFoundException e) {
throw new ProcessException("USM user file not found, please check the file path and file permissions.", e);
} catch (JsonProcessingException e) {
throw new ProcessException("Could not parse USM user file, please check the processor details for examples.", e);
}
return userDetails;
}
}