com.google.apphosting.base.AppId Maven / Gradle / Ivy
/*
* Copyright 2021 Google 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
*
* https://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.google.apphosting.base;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Class used for parsing the various components of the AppId.
*
*/
// The format is specified here:
// http://g3doc/apphosting/g3doc/wiki-carryover/app_id.md
public class AppId {
// Keep these in sync with {@code apphosting/base/id_util.cc}.
private static final int APP_ID_MAX_LEN = 100;
private static final Pattern DISPLAY_APP_ID_RE =
Pattern.compile("[a-z\\d\\-]{1," + APP_ID_MAX_LEN + "}", Pattern.CASE_INSENSITIVE);
private static final Pattern DOMAIN_RE =
Pattern.compile("([a-z\\d\\-\\.]{1," + APP_ID_MAX_LEN + "})?\\:", Pattern.CASE_INSENSITIVE);
private static final Pattern PARTITION_RE =
Pattern.compile("([a-z\\d\\-]{1," + APP_ID_MAX_LEN + "})?\\~", Pattern.CASE_INSENSITIVE);
private static final Pattern APP_ID_RE =
Pattern.compile(
"(?:" + PARTITION_RE + ")?((?:" + DOMAIN_RE + ")?(" + DISPLAY_APP_ID_RE + "))",
Pattern.CASE_INSENSITIVE);
private String appId;
private String domain;
private String longAppId;
private String displayAppId;
private String partition;
/**
* Create a new AppId based on an appId formatted as follows:
*
* [(partition)~][(domain):](display-app-id)
*
* @param appId The appId to parse.
*/
private AppId(String appId) {
this.appId = appId;
if (appId == null || appId.length() == 0) {
return;
}
Matcher matcher = APP_ID_RE.matcher(appId);
if (!matcher.matches()) {
return;
}
this.partition = matcher.group(1);
this.longAppId = matcher.group(2);
this.domain = matcher.group(3);
this.displayAppId = matcher.group(4);
}
/**
* @return The full appId.
*/
public String getAppId() {
return appId;
}
/**
* @return The domain component of this appId.
*/
public String getDomain() {
return domain;
}
/**
* @return The display-app-id component of this appId.
*/
public String getDisplayAppId() {
return displayAppId;
}
/**
* @return The partition component of the appId.
*/
public String getPartition() {
return partition;
}
/**
* @return The appId without the partition component.
*/
public String getLongAppId() {
return longAppId;
}
/**
* Returns a new AppId object based on an appId formatted as follows:
*
* [(partition)~][(domain):](display-app-id)
*
* @param appId The appId to parse.
*
* @return AppId object with the parsed appid components.
*/
public static AppId parse(String appId) {
return new AppId(appId);
}
}