com.swirlds.platform.CommandLineArgs Maven / Gradle / Ivy
/*
* Copyright (C) 2023-2024 Hedera Hashgraph, LLC
*
* Licensed 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 com.swirlds.platform;
import com.swirlds.common.platform.NodeId;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.util.HashSet;
import java.util.Set;
/**
* Command line arguments that can be passed to the browser when starting up
*
* @param localNodesToStart the set of nodes to start on this machine
*/
public record CommandLineArgs(@NonNull Set localNodesToStart) {
/** The command line option to start a set of nodes on this machine */
public static final String OPTION_LOCAL = "-local";
/**
* Parse the command line arguments passed to the main method
*
* @param args the arguments to parse
* @return the parsed arguments
*/
public static CommandLineArgs parse(@NonNull final String[] args) {
// This set contains the nodes set by the command line to start.
// If none are passed, then IP addresses will be compared to determine which node to start.
final Set localNodesToStart = new HashSet<>();
// Parse command line arguments (rudimentary parsing)
String currentOption = null;
for (final String item : args) {
final String arg = item.trim().toLowerCase();
if (arg.equals(OPTION_LOCAL)) {
currentOption = arg;
} else if (currentOption != null) {
try {
localNodesToStart.add(new NodeId(Integer.parseInt(arg)));
} catch (final NumberFormatException ex) {
// Intentionally suppress the NumberFormatException
}
}
}
return new CommandLineArgs(localNodesToStart);
}
}