com.github.alexdlaird.ngrok.conf.JavaNgrokConfig Maven / Gradle / Ivy
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/*
* Copyright (c) 2021-2024 Alex Laird
*
* SPDX-License-Identifier: MIT
*/
package com.github.alexdlaird.ngrok.conf;
import com.github.alexdlaird.ngrok.installer.NgrokInstaller;
import com.github.alexdlaird.ngrok.installer.NgrokVersion;
import com.github.alexdlaird.ngrok.process.NgrokLog;
import com.github.alexdlaird.ngrok.protocol.CreateTunnel;
import com.github.alexdlaird.ngrok.protocol.Region;
import java.nio.file.Path;
import java.util.function.Function;
import static java.util.Objects.isNull;
import static java.util.Objects.nonNull;
/**
* An object for managing java-ngrok's configuration to interact the ngrok binary.
*
* Basic Usage
*
* final Function<NgrokLog, Void> logEventCallback = ngrokLog -> {
* System.out.println(ngrokLog.getLine());
* return null;
* };
* final JavaNgrokConfig javaNgrokConfig = new JavaNgrokConfig.Builder()
* .withAuthToken("<NGROK_AUTHTOKEN>")
* .withRegion(Region.AU)
* .withLogEventCallback(logEventCallback)
* .withMaxLogs(10);
*
* final NgrokClient ngrokClient = new NgrokClient.Builder()
* .withJavaNgrokConfig(javaNgrokConfig)
* .build();
*
* ngrok Version Compatibility
* java-ngrok is compatible with ngrok v2 and v3, but by default it will install v3. To
* install v2 instead, set the version with {@link JavaNgrokConfig.Builder#withNgrokVersion(NgrokVersion)} and
* {@link CreateTunnel.Builder#withNgrokVersion(NgrokVersion)}.
*/
public class JavaNgrokConfig {
private final NgrokVersion ngrokVersion;
private final int maxLogs;
private final int startupTimeout;
private final boolean keepMonitoring;
private final Path ngrokPath;
private final Path configPath;
private final String authToken;
private final Region region;
private final Function logEventCallback;
private final String apiKey;
private JavaNgrokConfig(final Builder builder) {
this.ngrokVersion = builder.ngrokVersion;
this.maxLogs = builder.maxLogs;
this.startupTimeout = builder.startupTimeout;
this.keepMonitoring = builder.keepMonitoring;
this.ngrokPath = builder.ngrokPath;
this.configPath = builder.configPath;
this.authToken = builder.authToken;
this.region = builder.region;
this.logEventCallback = builder.logEventCallback;
this.apiKey = builder.apiKey;
}
/**
* Get the major ngrok version to be used.
*/
public NgrokVersion getNgrokVersion() {
return ngrokVersion;
}
/**
* Get the maximum number of ngrok logs to retain in the monitoring thread.
*/
public int getMaxLogs() {
return maxLogs;
}
/**
* Get the startup timeout before ngrok times out on boot.
*/
public int getStartupTimeout() {
return startupTimeout;
}
/**
* Get whether the ngrok process will continue to be monitored after it finishes starting up.
*/
public boolean isKeepMonitoring() {
return keepMonitoring;
}
/**
* Get the path to the ngrok binary.
*/
public Path getNgrokPath() {
return ngrokPath;
}
/**
* Get the path to the ngrok config file.
*/
public Path getConfigPath() {
return configPath;
}
/**
* Get the ngrok authtoken that will be passed to commands.
*/
public String getAuthToken() {
return authToken;
}
/**
* Get the region in which ngrok will start.
*/
public Region getRegion() {
return region;
}
/**
* Get the log event callback that will be invoked each time ngrok emits a log.
*/
public Function getLogEventCallback() {
return logEventCallback;
}
/**
* A ngrok API key.
*/
public String getApiKey() {
return apiKey;
}
/**
* Builder for a {@link JavaNgrokConfig}, see docs for that class for example usage.
*/
public static class Builder {
private NgrokVersion ngrokVersion = NgrokVersion.V3;
private int maxLogs = 100;
private int startupTimeout = 15;
private boolean keepMonitoring = true;
private Path ngrokPath;
private Path configPath;
private String authToken;
private Region region;
private Function logEventCallback;
private String apiKey;
/**
* Construct a JavaNgrokConfig Builder.
*/
public Builder() {
}
/**
* Copy a {@link JavaNgrokConfig} in to a new Builder.
*
* @param javaNgrokConfig The JavaNgrokConfig to copy.
*/
public Builder(final JavaNgrokConfig javaNgrokConfig) {
this.ngrokVersion = javaNgrokConfig.ngrokVersion;
this.maxLogs = javaNgrokConfig.maxLogs;
this.startupTimeout = javaNgrokConfig.startupTimeout;
this.keepMonitoring = javaNgrokConfig.keepMonitoring;
this.ngrokPath = javaNgrokConfig.ngrokPath;
this.configPath = javaNgrokConfig.configPath;
this.authToken = javaNgrokConfig.authToken;
this.region = javaNgrokConfig.region;
this.logEventCallback = javaNgrokConfig.logEventCallback;
this.apiKey = javaNgrokConfig.apiKey;
}
/**
* The major version of ngrok to be used.
*/
public Builder withNgrokVersion(final NgrokVersion ngrokVersion) {
this.ngrokVersion = ngrokVersion;
return this;
}
/**
* The maximum number of ngrok logs to retain in the monitoring thread.
*
* @throws IllegalArgumentException The argument was invalid.
*/
public Builder withMaxLogs(final int maxLogs) {
if (maxLogs < 1) {
throw new IllegalArgumentException("\"maxLogs\" must be greater than 0.");
}
this.maxLogs = maxLogs;
return this;
}
/**
* The max number of seconds to wait for ngrok to start before timing out.
*
* @throws IllegalArgumentException The argument was invalid.
*/
public Builder withStartupTimeout(final int startupTimeout) {
if (startupTimeout < 1) {
throw new IllegalArgumentException("\"startupTimeout\" must be greater than 0.");
}
this.startupTimeout = startupTimeout;
return this;
}
/**
* Don't keep monitoring ngrok (for logs, etc.) after startup is complete.
*/
public Builder withoutMonitoring() {
this.keepMonitoring = false;
return this;
}
/**
* The path to the ngrok binary, defaults to being placed in the same directory as
* ngrok's configs.
*/
public Builder withNgrokPath(final Path ngrokPath) {
this.ngrokPath = ngrokPath;
return this;
}
/**
* The path to the ngrok config file, defaults to ngrok's default config
* location.
*/
public Builder withConfigPath(final Path configPath) {
this.configPath = configPath;
return this;
}
/**
* A ngrok authtoken to pass to commands (overrides what is in the config). If not set here, the
* {@link Builder} will attempt to use the environment variable NGROK_AUTHTOKEN if it is set.
*/
public Builder withAuthToken(final String authToken) {
this.authToken = authToken;
return this;
}
/**
* The region in which ngrok should start.
*/
public Builder withRegion(final Region region) {
this.region = region;
return this;
}
/**
* A callback that will be invoked each time ngrok emits a log. {@link #keepMonitoring} must be set
* to true or the function will stop being called after ngrok finishes starting.
*/
public Builder withLogEventCallback(final Function logEventCallback) {
this.logEventCallback = logEventCallback;
return this;
}
/**
* A ngrok API key.
*/
public Builder withApiKey(final String apiKey) {
this.apiKey = apiKey;
return this;
}
/**
* Build the {@link JavaNgrokConfig}.
*/
public JavaNgrokConfig build() {
if (isNull(ngrokPath)) {
ngrokPath = NgrokInstaller.DEFAULT_NGROK_PATH;
}
if (isNull(configPath)) {
configPath = NgrokInstaller.DEFAULT_CONFIG_PATH;
}
final String envAuthToken = System.getenv("NGROK_AUTHTOKEN");
if (isNull(authToken) && nonNull(envAuthToken)) {
authToken = envAuthToken;
}
return new JavaNgrokConfig(this);
}
}
}