[英]Spring code integrated with Firebase database works fine on IDE but NOT on Tomcat
我有一個Spring Boot Web應用程序(非Android)。 有一個名為initializeComments的方法,並用@PostConstruct進行注釋。 此方法從Firebase數據庫讀取數據。 相同的完全相同的應用程序代碼在Eclipse IDE上有效,但是當我將此war文件復制到tomcat容器並使用tomcat / bin / startup.sh腳本運行它時,則無法使用。 我花了大量時間嘗試調試和研究,但是找不到任何解決方案。 所以發布到這個論壇尋求幫助。 欣賞是否有人可以提供任何指針。
@PostConstruct
void initializeComments()
{
log.info("initializeComments::");
final CountDownLatch done = new CountDownLatch(1);
log.info("initializeComments::firebaseDatabseComments::"+firebaseDatabseComments.toString());
// Load all comments
firebaseDatabseComments.addListenerForSingleValueEvent(new ValueEventListener()
{
public void onDataChange(DataSnapshot snapshot)
{
for (DataSnapshot child : snapshot.getChildren())
{
String key= child.getKey();
List<String> onlycomments = new ArrayList<String>();
for (DataSnapshot subchild : child.getChildren())
{
String value = (String) subchild.getValue();
onlycomments.add(value);
}
comments.put(key, onlycomments);
}
log.info("initializePosts::comments: " + comments.toString());
done.countDown();
}
public void onCancelled(DatabaseError databaseError)
{
log.info("initializeComments::The read failed for comments: " + databaseError.getCode());
}
});
try
{
done.await();
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
我的pom文件:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Finchley.M9</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>6.7.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>io.dropwizard.metrics</groupId>
<artifactId>metrics-core</artifactId>
</dependency>
<dependency>
<groupId>io.dropwizard.metrics</groupId>
<artifactId>metrics-json</artifactId>
</dependency>
<dependency>
<groupId>io.dropwizard.metrics</groupId>
<artifactId>metrics-annotation</artifactId>
</dependency>
<dependency>
<groupId>com.ryantenney.metrics</groupId>
<artifactId>metrics-spring</artifactId>
<version>3.1.3</version>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
<version>1.5.1</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.json</artifactId>
<version>1.0.4</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR7</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
</plugins>
</build>
當我在Eclipse IDE上運行時,我可以使用完全相同的代碼成功讀取所有帖子。 但是,當我在tomcat(戰爭文件)上運行時,它只是掛起而從未退出。 我沒有收到任何異步響應。 我還處理了CountDownLatch部分,以確保它不會在主函數返回之前退出。 那我在哪里錯了?
最終通過在Firebase中啟用調試日志找到了問題...似乎時鍾未同步。 完成ntp同步后,問題已解決。
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