Spring @async 子线程上下文多租户
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【中文标题】Spring @async 子线程上下文多租户【英文标题】:Spring @async child thread context multitenancy 【发布时间】:2018-06-26 02:42:34 【问题描述】:我有一个应用程序,它向我的 java 应用程序发送一些 REST 调用。我必须在 @Async 模式下运行最后一个命令,以便用户可以在有异步任务执行另一个 SOAP 调用时继续使用应用程序。
问题是我已经在数据库中自动装配了 TenantContext 和几个租户标识符。在执行异步任务时,它具有我的主线程的租户上下文,并为错误的租户保存数据。
这是我的 JpaTransactionManager,它为数据库中的每个事务调用:
@Autowired
private TenantContext tenantContext;
@Autowired
private Flyway flyway;
@Autowired
private Environment environment;
@Override
protected void doBegin(final Object transaction, final TransactionDefinition definition)
super.doBegin(transaction, definition);
final EntityManagerHolder entityManagerHolder = (EntityManagerHolder) TransactionSynchronizationManager.getResource(getEntityManagerFactory());
final EntityManager entityManager = entityManagerHolder.getEntityManager();
String subAccountId = "";
if (environment.getActiveProfiles().length == 0 || !environment.getActiveProfiles()[0].equals("production"))
subAccountId = "SCAN4CLOUD";
else
subAccountId = tenantContext.getTenant().getAccount().getId().toUpperCase();
entityManager.setProperty("tenant", subAccountId);
我尝试使用以下类拦截异步调用以设置正确的租户上下文。
@Configuration
@EnableAsync
public class AsyncConfig extends AsyncConfigurerSupport
@Autowired
private TenantContext tenantContext;
@Autowired
private Environment environment;
private HashMap<String, ContextAwarePoolExecutor> tenantThreadPoolTaskExecutor = new HashMap<String, ContextAwarePoolExecutor>();
@Override
@Bean
@Scope(value = "request", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Executor getAsyncExecutor()
String subAccountId = "";
if (environment.getActiveProfiles().length == 0 || !environment.getActiveProfiles()[0].equals("production"))
subAccountId = "SCAN4CLOUD";
else
subAccountId = tenantContext.getTenant().getAccount().getId().toUpperCase();
if (!tenantThreadPoolTaskExecutor.containsKey(subAccountId))
tenantThreadPoolTaskExecutor.put(subAccountId, new ContextAwarePoolExecutor(tenantContext));
return tenantThreadPoolTaskExecutor.get(subAccountId);
ContextAwarePoolExecutor:
public class ContextAwarePoolExecutor extends ThreadPoolTaskExecutor
private TenantContext tenantContext;
public ContextAwarePoolExecutor(TenantContext tenantContext)
this.tenantContext = tenantContext;
@Override
public <T> Future<T> submit(Callable<T> task)
return super.submit(new ContextAwareCallable(task, tenantContext));
@Override
public <T> ListenableFuture<T> submitListenable(Callable<T> task)
return super.submitListenable(new ContextAwareCallable(task, tenantContext));
ContextAwareCallable:
public class ContextAwareCallable<T> implements Callable<T>
private Callable<T> task;
private TenantContext tenantContext;
public ContextAwareCallable(Callable<T> task, TenantContext tenantContext)
this.task = task;
this.tenantContext = tenantContext;
@Override
public T call() throws Exception
if (tenantContext != null)
return tenantContext.execute(tenantContext.getTenant().getId(), task);
return task.call();
但它仍然没有给我父线程的正确租户。
对此有何建议或其他方法?
谢谢, 没有Ta
【问题讨论】:
【参考方案1】:Tenantcontext 类来自 SAP:import com.sap.cloud.account.TenantContext; https://appdoc.app/artifact/com.sap.cloud/neo-java-web-api/1.105.21/com/sap/cloud/account/TenantContext.html
import java.util.concurrent.Callable;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import com.sap.cloud.account.TenantContext;
public class ContextAwareCallable<T> implements Callable<T>
private Callable<T> task;
private TenantContext tenantContext;
private String tenantId;
private RequestAttributes context;
public ContextAwareCallable(Callable<T> task, TenantContext tenantContext, RequestAttributes context)
this.task = task;
this.tenantContext = tenantContext;
this.context = context;
if (tenantContext != null)
this.tenantId = tenantContext.getTenant().getId();
@Override
public T call() throws Exception
if (context != null)
RequestContextHolder.setRequestAttributes(context);
if (tenantId != null)
return tenantContext.execute(tenantId, task);
return task.call();
【讨论】:
【参考方案2】:我通过在 contextawarecallable 构造函数中直接添加tenantid 解决了这个问题。现在它正在工作。
【讨论】:
但是你已经在构造函数中传递了tenantContext,它应该已经标识了tenantId。这对您有什么帮助? 我应该发布一些代码解释,因为我也不知道在写这篇文章时我在想什么。我只知道我在访问租户上下文时遇到了一些问题,所以我在 ContextAwareCallable 私有字符串租户 ID 中创建了一个变量,并在构造函数中传递了租户 ID。但我不确定为什么我在那里遇到了一些问题。 您能否发布您所做的更正?你也可以发布 TenantContext 类吗?以上是关于Spring @async 子线程上下文多租户的主要内容,如果未能解决你的问题,请参考以下文章