com.alibaba.csp.sentinel.SphU Java Exaples

Source File: ClusterFlowClientController.java From sentinel-tutorial with Apache License 2.0

6 votes

/**
 * 模拟流量请求该方法
 */
@GetMapping("/clusterFlow")
public @ResponseBody
String clusterFlow() {
    Entry entry = null;
    String retVal;
    try{
        entry = SphU.entry(RESOURCE_NAME, EntryType.IN,1);
        retVal = "passed";
    }catch(BlockException e){
        retVal = "blocked";
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return retVal;
}

Source File: WarmUpRateLimiterFlowDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(50));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: WarmUpRateLimiterFlowDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            // token acquired, means pass
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(2000));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: WarmUpFlowDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            // token acquired, means pass
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(2000));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: ParamFlowQpsRunner.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Override
public void run() {

    while (!stop) {
        Entry entry = null;
        T param = generateParam();
        try {
            entry = SphU.entry(resourceName, EntryType.IN, 1, param);
            // Add pass for parameter.
            passFor(param);
        } catch (BlockException e) {
            // block.incrementAndGet();
            blockFor(param);
        } catch (Exception ex) {
            // biz exception
            ex.printStackTrace();
        } finally {
            // total.incrementAndGet();
            if (entry != null) {
                entry.exit(1, param);
            }
        }

        sleep(ThreadLocalRandom.current().nextInt(0, 10));
    }
}

Source File: WarmUpFlowDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(50));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: AsyncEntryDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

private void directlyAsync() {
    try {
        final AsyncEntry entry = SphU.asyncEntry("test-async-not-nested");

        this.invoke("abc", result -> {
            // If no nested entry later, we don't have to wrap in `ContextUtil.runOnContext()`.
            try {
                // Here to handle the async result (without other entry).
            } finally {
                // Exit the async entry.
                entry.exit();
            }
        });
    } catch (BlockException e) {
        // Request blocked, handle the exception.
        e.printStackTrace();
    }
}

Source File: PullConsumerDemo.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

private static void doSomething(MessageExt message) {
    pool.submit(() -> {
        Entry entry = null;
        try {
            ContextUtil.enter(KEY);
            entry = SphU.entry(KEY, EntryType.OUT);

            // Your business logic here.
            System.out.printf("[%d][%s][Success: %d] Receive New Messages: %s %n", System.currentTimeMillis(),
                Thread.currentThread().getName(), SUCCESS_COUNT.addAndGet(1), new String(message.getBody()));
        } catch (BlockException ex) {
            // Blocked.
            System.out.println("Blocked: " + FAIL_COUNT.addAndGet(1));
        } finally {
            if (entry != null) {
                entry.exit();
            }
            ContextUtil.exit();
        }
    });
}

Source File: DemoController.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@RequestMapping("/link")
@ResponseBody
public String link() throws BlockException {

    Entry entry = SphU.entry("head1", EntryType.IN);

    Entry entry1 = SphU.entry("head2", EntryType.IN);
    Entry entry2 = SphU.entry("head3", EntryType.IN);
    Entry entry3 = SphU.entry("head4", EntryType.IN);

    entry3.exit();
    entry2.exit();
    entry1.exit();
    entry.exit();
    return "successfully create a call link";
}

Source File: SentinelReactorSubscriber.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

private void entryWhenSubscribed() {
    ContextConfig sentinelContextConfig = entryConfig.getContextConfig();
    if (sentinelContextConfig != null) {
        // If current we're already in a context, the context config won't work.
        ContextUtil.enter(sentinelContextConfig.getContextName(), sentinelContextConfig.getOrigin());
    }
    try {
        AsyncEntry entry = SphU.asyncEntry(entryConfig.getResourceName(), entryConfig.getEntryType(),
            entryConfig.getAcquireCount(), entryConfig.getArgs());
        this.currentEntry = entry;
        actual.onSubscribe(this);
    } catch (BlockException ex) {
        // Mark as completed (exited) explicitly.
        entryExited.set(true);
        // Signal cancel and propagate the {@code BlockException}.
        cancel();
        actual.onSubscribe(this);
        actual.onError(ex);
    } finally {
        if (sentinelContextConfig != null) {
            ContextUtil.exit();
        }
    }
}

Source File: FlowPartialIntegrationTest.java From Sentinel with Apache License 2.0

6 votes

@Test
public void testFlowRule_other() {

    FlowRule flowRule = new FlowRule();
    flowRule.setResource("testOther");
    flowRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
    flowRule.setCount(0);
    flowRule.setLimitApp("other");
    FlowRuleManager.loadRules(Arrays.asList(flowRule));

    Entry e = null;
    try {
        e = SphU.entry("testOther");
    } catch (BlockException e1) {
        e1.printStackTrace();fail("Should had failed");
    }

    if (e != null) {
        e.exit();
    } else {
        fail("Should had failed");
    }
}

Source File: FlowPartialIntegrationTest.java From Sentinel-Dashboard-Nacos with Apache License 2.0

6 votes

@Test
public void testFlowRule_other() {

    FlowRule flowRule = new FlowRule();
    flowRule.setResource("testOther");
    flowRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
    flowRule.setCount(0);
    flowRule.setLimitApp("other");
    FlowRuleManager.loadRules(Arrays.asList(flowRule));

    Entry e = null;
    try {
        e = SphU.entry("testOther");
    } catch (BlockException e1) {
        e1.printStackTrace();fail("Should had failed");
    }

    if (e != null) {
        e.exit();
    } else {
        fail("Should had failed");
    }
}

Source File: FlowController.java From sentinel-tutorial with Apache License 2.0

6 votes

@GetMapping("/testSentinel")
public @ResponseBody
String testSentinel() {
    // 定义资源，具体的规则通过 dashboard 在页面中配置
    String resourceName = "testSentinel";
    Entry entry = null;
    String retVal;
    try{
        entry = SphU.entry(resourceName, EntryType.IN);
        retVal = "passed";
    }catch(BlockException e){
        retVal = "blocked";
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return retVal;
}

Source File: FreqParamFlowController.java From sentinel-tutorial with Apache License 2.0

6 votes

/**
 * 热点参数限流
 * 构造不同的uid的值，并且以不同的频率来请求该方法，查看效果
 */
@GetMapping("/freqParamFlow")
public @ResponseBody
String freqParamFlow(@RequestParam("uid") Long uid,@RequestParam("ip") Long ip) {
    Entry entry = null;
    String retVal;
    try{
        // 只对参数 uid 的值进行限流，参数 ip 的值不进行限制
        entry = SphU.entry(resourceName, EntryType.IN,1,uid);
        retVal = "passed";
    }catch(BlockException e){
        retVal = "blocked";
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return retVal;
}

Source File: UserService.java From sentinel-tutorial with Apache License 2.0

6 votes

/**
 * 根据uid获取用户信息
 * @param uid uid
 * @return 用户信息
 */
public User getUser(Long uid){
    Entry entry = null;
    try {
        // 流控
        entry = SphU.entry(USER_RES);
        // 业务代码
        User user = new User();
        user.setUid(uid);
        user.setName("user-" + uid);
        return user;
    }catch(BlockException e){
        // 被限流了
        System.out.println("[getUser] has been protected! Time="+System.currentTimeMillis());
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return null;
}

Source File: FreqParamFlowController.java From sentinel-tutorial with Apache License 2.0

6 votes

/**
 * 热点参数限流
 */
@GetMapping("/freqParamFlowWithoutParam")
public @ResponseBody
String freqParamFlowWithoutParam(@RequestParam("uid") Long uid,@RequestParam("ip") Long ip) {
    Entry entry = null;
    String retVal;
    try{
        // 如果不传入任何参数，来查询热点参数限流的效果
        entry = SphU.entry(resourceName, EntryType.IN,1);
        retVal = "passed";
    }catch(BlockException e){
        retVal = "blocked";
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return retVal;
}

Source File: ClusterFlowClientController.java From sentinel-tutorial with Apache License 2.0

6 votes

/**
 * 模拟流量请求该方法
 */
@GetMapping("/clusterFlow")
public @ResponseBody
String clusterFlow() {
    Entry entry = null;
    String retVal;
    try{
        entry = SphU.entry(RESOURCE_NAME, EntryType.IN,1);
        retVal = "passed";
    }catch(BlockException e){
        retVal = "blocked";
    }finally {
        if(entry!=null){
            entry.exit();
        }
    }
    return retVal;
}

Source File: SentinelStart.java From blog with BSD 2-Clause "Simplified" License

6 votes

public static void main(String[] args) throws InterruptedException {
	// 配置规则.
	initFlowRules();

	while (true) {
		// 1.5.0 版本开始可以直接利用 try-with-resources 特性，自动 exit entry
		try (Entry entry = SphU.entry("HelloWorld")) {
			// 被保护的逻辑
			System.out.println("hello world");
		} catch (BlockException ex) {
			// 处理被流控的逻辑
			System.out.println("blocked!");
		}
		Thread.sleep(10);
	}
}

Source File: WarmUpFlowDemo.java From Sentinel with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            // token acquired, means pass
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(2000));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: WarmUpFlowDemo.java From Sentinel with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(50));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: WarmUpRateLimiterFlowDemo.java From Sentinel with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            // token acquired, means pass
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(2000));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: WarmUpRateLimiterFlowDemo.java From Sentinel with Apache License 2.0

6 votes

@Override
public void run() {
    while (!stop) {
        Entry entry = null;
        try {
            entry = SphU.entry(KEY);
            pass.addAndGet(1);
        } catch (BlockException e1) {
            block.incrementAndGet();
        } catch (Exception e2) {
            // biz exception
        } finally {
            total.incrementAndGet();
            if (entry != null) {
                entry.exit();
            }
        }
        Random random2 = new Random();
        try {
            TimeUnit.MILLISECONDS.sleep(random2.nextInt(50));
        } catch (InterruptedException e) {
            // ignore
        }
    }
}

Source File: AsyncEntryDemo.java From Sentinel with Apache License 2.0

6 votes

private void anotherAsync() {
    try {
        final AsyncEntry entry = SphU.asyncEntry("test-another-async");

        CompletableFuture.runAsync(() -> {
            ContextUtil.runOnContext(entry.getAsyncContext(), () -> {
                try {
                    TimeUnit.SECONDS.sleep(2);
                    // Normal entry nested in asynchronous entry.
                    anotherSyncInAsync();

                    System.out.println("Async result: 666");
                } catch (InterruptedException e) {
                    // Ignore.
                } finally {
                    entry.exit();
                }
            });
        });
    } catch (BlockException ex) {
        ex.printStackTrace();
    }
}

Source File: AsyncEntryDemo.java From Sentinel with Apache License 2.0

6 votes

private void directlyAsync() {
    try {
        final AsyncEntry entry = SphU.asyncEntry("test-async-not-nested");

        this.invoke("abc", result -> {
            // If no nested entry later, we don't have to wrap in `ContextUtil.runOnContext()`.
            try {
                // Here to handle the async result (without other entry).
            } finally {
                // Exit the async entry.
                entry.exit();
            }
        });
    } catch (BlockException e) {
        // Request blocked, handle the exception.
        e.printStackTrace();
    }
}

Source File: ParamFlowQpsRunner.java From Sentinel with Apache License 2.0

6 votes

@Override
public void run() {

    while (!stop) {
        Entry entry = null;
        T param = generateParam();
        try {
            entry = SphU.entry(resourceName, EntryType.IN, 1, param);
            // Add pass for parameter.
            passFor(param);
        } catch (BlockException e) {
            // block.incrementAndGet();
            blockFor(param);
        } catch (Exception ex) {
            // biz exception
            ex.printStackTrace();
        } finally {
            // total.incrementAndGet();
            if (entry != null) {
                entry.exit(1, param);
            }
        }

        sleep(ThreadLocalRandom.current().nextInt(0, 10));
    }
}

Source File: PullConsumerDemo.java From Sentinel with Apache License 2.0

6 votes

private static void doSomething(MessageExt message) {
    pool.submit(() -> {
        Entry entry = null;
        try {
            ContextUtil.enter(KEY);
            entry = SphU.entry(KEY, EntryType.OUT);

            // Your business logic here.
            System.out.printf("[%d][%s][Success: %d] Receive New Messages: %s %n", System.currentTimeMillis(),
                Thread.currentThread().getName(), SUCCESS_COUNT.addAndGet(1), new String(message.getBody()));
        } catch (BlockException ex) {
            // Blocked.
            System.out.println("Blocked: " + FAIL_COUNT.addAndGet(1));
        } finally {
            if (entry != null) {
                entry.exit();
            }
            ContextUtil.exit();
        }
    });
}

Source File: DemoController.java From Sentinel with Apache License 2.0

6 votes

@RequestMapping("/link")
@ResponseBody
public String link() throws BlockException {

    Entry entry = SphU.entry("head1", EntryType.IN);

    Entry entry1 = SphU.entry("head2", EntryType.IN);
    Entry entry2 = SphU.entry("head3", EntryType.IN);
    Entry entry3 = SphU.entry("head4", EntryType.IN);

    entry3.exit();
    entry2.exit();
    entry1.exit();
    entry.exit();
    return "successfully create a call link";
}

Source File: SentinelReactorSubscriber.java From Sentinel with Apache License 2.0

6 votes

private void entryWhenSubscribed() {
    ContextConfig sentinelContextConfig = entryConfig.getContextConfig();
    if (sentinelContextConfig != null) {
        // If current we're already in a context, the context config won't work.
        ContextUtil.enter(sentinelContextConfig.getContextName(), sentinelContextConfig.getOrigin());
    }
    try {
        AsyncEntry entry = SphU.asyncEntry(entryConfig.getResourceName(), entryConfig.getResourceType(),
            entryConfig.getEntryType(), entryConfig.getAcquireCount(), entryConfig.getArgs());
        this.currentEntry = entry;
        actual.onSubscribe(this);
    } catch (BlockException ex) {
        // Mark as completed (exited) explicitly.
        entryExited.set(true);
        // Signal cancel and propagate the {@code BlockException}.
        cancel();
        actual.onSubscribe(this);
        actual.onError(ex);
    } finally {
        if (sentinelContextConfig != null) {
            ContextUtil.exit();
        }
    }
}

Source File: CommonTotalFilter.java From Sentinel with Apache License 2.0

6 votes

@Override
public void doFilter(ServletRequest request, ServletResponse response,
                     FilterChain chain) throws IOException, ServletException {
    HttpServletRequest sRequest = (HttpServletRequest)request;

    Entry entry = null;
    try {
        ContextUtil.enter(WebServletConfig.WEB_SERVLET_CONTEXT_NAME);
        entry = SphU.entry(TOTAL_URL_REQUEST, ResourceTypeConstants.COMMON_WEB);
        chain.doFilter(request, response);
    } catch (BlockException e) {
        HttpServletResponse sResponse = (HttpServletResponse)response;
        WebCallbackManager.getUrlBlockHandler().blocked(sRequest, sResponse, e);
    } catch (IOException | ServletException | RuntimeException e2) {
        Tracer.trace(e2);
        throw e2;
    } finally {
        if (entry != null) {
            entry.exit();
        }
        ContextUtil.exit();
    }
}

Source File: AbstractSentinelInterceptor.java From Sentinel with Apache License 2.0

6 votes

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
    throws Exception {
    try {
        String resourceName = getResourceName(request);

        if (StringUtil.isNotEmpty(resourceName)) {
            // Parse the request origin using registered origin parser.
            String origin = parseOrigin(request);
            String contextName = getContextName(request);
            ContextUtil.enter(contextName, origin);
            Entry entry = SphU.entry(resourceName, ResourceTypeConstants.COMMON_WEB, EntryType.IN);

            setEntryInRequest(request, baseWebMvcConfig.getRequestAttributeName(), entry);
        }
        return true;
    } catch (BlockException e) {
        try {
            handleBlockException(request, response, e);
        } finally {
            ContextUtil.exit();
        }
        return false;
    }
}

com.alibaba.csp.sentinel.SphU Java Examples