什麼是wildfly

JBoss AS 從8版本起名為wildfly。Wildfly是一個開源的基於JavaEE的輕量級應用伺服器。可以在任何商業應用中免費使用。

WildFly是一個靈活的、輕量的、強大管理能力的應用程式伺服器。Wildfly是一個管理EJB的容器和伺服器，但JBoss核心服務不包括支援servlet/JSP的WEB容器，一般與Tomcat或Jetty繫結使用。

特點

• 無與倫比的速度：快速啟動，無限的網路效能和可擴充套件性。
• 非常的輕量級：瘦記憶體管理，執行時間可定製化。
• 強大的管理功能：統一的配置和管理。

Wildfly更多特點及與市面上常見的Web服務對比，可參看《熱門WEB容器TOMCAT、JETTY、 GLASSFISH、WILDFLY對比》。

下載安裝

wildfly下載地址：https://wildfly.org/downloads/

目前，最新版本是18.0.0.Final，選擇“Java EE Full & Web Distribution”項對應的ZIP版本，點選下載即可。如果官網下載較慢，可關注微信公眾號“程式新視界”，回覆“wildfly”獲得下載連結。

安裝java環境要求Java8或更高版本。

所謂的安裝即解壓即可。下面看一下該版本的目錄結構：

├── LICENSE.txt
├── README.txt
├── appclient
├── bin
├── copyright.txt
├── docs
├── domain
├── jboss-modules.jar
├── modules
├── standalone
└── welcome-content
 

standalone目錄下存放的應用將單獨佔用程序，可單獨啟動和關閉，之間沒有關聯性。旗下有許多xml檔案可供啟動時選擇。

domain目錄下的應用之間有關聯性，managing multiple servers from a single control point。

modules目錄，jboss採用module載入驅動。

readme及啟動命令

重點看一下readme中的內容，提供了啟動相關的指導。

關鍵特性：

Key Features
------------
* Jakarta EE 8 support
* Fast Startup
* Small Footprint
* Modular Design
* Unified Configuration and Management
* Distributed Domain Management
 

文件獲取，同時也可以看出啟動時預設是監聽8080埠。

Also, once WildFly is started you can go to http://localhost:8080/
for additional information.

啟動命令：

Starting a Standalone Server
----------------------------
A WildFly standalone server runs a single instance.

<JBOSS_HOME>/bin/standalone.sh      (Unix / Linux)

<JBOSS_HOME>\bin\standalone.bat     (Windows)

啟動指令碼位於根目錄/bin目錄中。Windows為standalone.bat，Linux為standalone.sh。

Wildfly還可以啟動一個管理後臺來對服務進行管理。

Starting a Managed Domain
-------------------------
A WildFly managed domain allows you to control and configure multiple instances,
potentially across several physical (or virtual) machines. The default 
configuration includes a domain controller and a single server group with three 
servers (two of which start automatically), all running on the localhost.

<JBOSS_HOME>/bin/domain.sh      (Unix / Linux)

<JBOSS_HOME>\bin\domain.bat     (Windows)

啟動指令碼位於根目錄/bin目錄中。Windows為domain.bat，Linux為domain.sh。

停止服務，可以通過控制檯輸入Ctrl+c命令來操作。如果服務在後臺執行，可執行一下命令進行停止。

<JBOSS_HOME>/bin/jboss-cli.sh --connect --command=:shutdown      (Unix / Linux)

<JBOSS_HOME>\bin\jboss-cli.bat --connect --command=:shutdown     (Windows)

啟動操作

現在啟動專案standalone看一下效果。

19:48:11,234 INFO  [org.jboss.as.ejb3] (MSC service thread 1-6) WFLYEJB0482: Strict pool mdb-strict-max-pool is using a max instance size of 32 (per class), which is derived from the number of CPUs on this host.
19:48:11,234 INFO  [org.jboss.as.ejb3] (MSC service thread 1-2) WFLYEJB0481: Strict pool slsb-strict-max-pool is using a max instance size of 128 (per class), which is derived from thread worker pool sizing.
19:48:11,296 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-4) WFLYUT0006: Undertow HTTP listener default listening on 127.0.0.1:8080
19:48:11,409 INFO  [org.jboss.as.ejb3] (MSC service thread 1-6) WFLYEJB0493: EJB subsystem suspension complete
19:48:11,479 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-3) WFLYJCA0001: Bound data source [java:jboss/datasources/ExampleDS]
19:48:11,579 INFO  [org.jboss.as.patching] (MSC service thread 1-3) WFLYPAT0050: WildFly Full cumulative patch ID is: base, one-off patches include: none
19:48:11,596 WARN  [org.jboss.as.domain.management.security] (MSC service thread 1-5) WFLYDM0111: Keystore /Users/zzs/tools/wildfly18/standalone/configuration/application.keystore not found, it will be auto generated on first use with a self signed certificate for host localhost
19:48:11,606 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-6) WFLYDS0013: Started FileSystemDeploymentService for directory /Users/zzs/tools/wildfly18/standalone/deployments
19:48:11,746 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-2) WFLYUT0006: Undertow HTTPS listener https listening on 127.0.0.1:8443
19:48:11,846 INFO  [org.jboss.ws.common.management] (MSC service thread 1-2) JBWS022052: Starting JBossWS 5.3.0.Final (Apache CXF 3.3.3)
19:48:11,963 INFO  [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0212: Resuming server
19:48:11,965 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0060: Http management interface listening on http://127.0.0.1:9990/management
19:48:11,965 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
19:48:11,965 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: WildFly Full 18.0.0.Final (WildFly Core 10.0.0.Final) started in 3880ms - Started 315 of 577 services (369 services are lazy, passive or on-demand)

通過以上部分日誌可以看到，wildfly監聽了8080，8443和9990埠。

訪問伺服器的url為：127.0.0.1:8080，訪問管理後臺的url為：http://127.0.0.1:9990/。

訪問伺服器可看到如下頁面：

頁面內包含文件、快速啟動、管理後臺等連結。

此時訪問後臺管理會提示如下內容：

Welcome to WildFly
Your WildFly Application Server is running.
However you have not yet added any users to be able to access the admin console.

To add a new user execute the add-user.sh script within the bin folder of your WildFly installation and enter the requested information.

By default the realm name used by WildFly is "ManagementRealm" this is already selected by default.

After you have added the user follow this link to Try Again.

也就是說啟動成功了，但沒有配置使用者。同tomcat一樣，wildfly也有自己的服務管理頁面，可以統一管理應用，設定許可權使用者。執行add-user指令碼來新增管理者使用者。

bin zzs$ ./add-user.sh

What type of user do you wish to add?
 a) Management User (mgmt-users.properties)
 b) Application User (application-users.properties)
 # 輸入a，以新增管理使用者
(a): a

Enter the details of the new user to add.
Using realm 'ManagementRealm' as discovered from the existing property files.
# 輸入使用者名稱
Username : zzs
Password recommendations are listed below. To modify these restrictions edit the add-user.properties configuration file.
 - The password should be different from the username
 - The password should not be one of the following restricted values {root, admin, administrator}
 - The password should contain at least 8 characters, 1 alphabetic character(s), 1 digit(s), 1 non-alphanumeric symbol(s)
 # 輸入使用者密碼
Password :
# 重新輸入密碼
Re-enter Password :
# 留空即可或輸入ManagementRealm
What groups do you want this user to belong to? (Please enter a comma separated list, or leave blank for none)[  ]: ManagementRealm
About to add user 'zzs' for realm 'ManagementRealm'
# 繼續則輸入yes
Is this correct yes/no? yes
Added user 'zzs' to file '/Users/zzs/tools/wildfly18/standalone/configuration/mgmt-users.properties'
Added user 'zzs' to file '/Users/zzs/tools/wildfly18/domain/configuration/mgmt-users.properties'
Added user 'zzs' with groups ManagementRealm to file '/Users/zzs/tools/wildfly18/standalone/configuration/mgmt-groups.properties'
Added user 'zzs' with groups ManagementRealm to file '/Users/zzs/tools/wildfly18/domain/configuration/mgmt-groups.properties'
Is this new user going to be used for one AS process to connect to another AS process?
e.g. for a slave host controller connecting to the master or for a Remoting connection for server to server EJB calls.
# 繼續則輸入yes
yes/no? yes

這裡需要注意，使用者新增完畢後，將回饋給你此使用者的secret value，可在domain與slave 的通訊中用到
To represent the user add the following to the server-identities definition <secret value="MTk4NzEwMjlfUXE=" />

每一步操作都會有對應的提示與選項，按照提示填寫即可。

設定完成，再進點選Administration Console或訪問http://127.0.0.1:9990/，輸入剛剛設定的使用者名稱密碼，即可登入管理後臺。

原文連結：《wildfly（JBoss AS）應用伺服器快速入門》

參考文章：《熱門WEB容器TOMCAT、JETTY、 GLASSFISH、WILDFLY對比》

程式新視界：精彩和成長都不容錯過

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