使用 Amazon 软件开发工具包为 Amazon SNS 推送通知创建平台终端节点
以下代码示例展示如何为 Amazon SNS 推送通知创建平台终端节点。
- Java
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- SDK for Java 1.x
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class RegistrationExample { AmazonSNSClient client = new AmazonSNSClient(); //provide credentials here String arnStorage = null; public void registerWithSNS() { String endpointArn = retrieveEndpointArn(); String token = "Retrieved from the mobile operating system"; boolean updateNeeded = false; boolean createNeeded = (null == endpointArn); if (createNeeded) { // No platform endpoint ARN is stored; need to call createEndpoint. endpointArn = createEndpoint(); createNeeded = false; } System.out.println("Retrieving platform endpoint data..."); // Look up the platform endpoint and make sure the data in it is current, even if // it was just created. try { GetEndpointAttributesRequest geaReq = new GetEndpointAttributesRequest() .withEndpointArn(endpointArn); GetEndpointAttributesResult geaRes = client.getEndpointAttributes(geaReq); updateNeeded = !geaRes.getAttributes().get("Token").equals(token) || !geaRes.getAttributes().get("Enabled").equalsIgnoreCase("true"); } catch (NotFoundException nfe) { // We had a stored ARN, but the platform endpoint associated with it // disappeared. Recreate it. createNeeded = true; } if (createNeeded) { createEndpoint(token); } System.out.println("updateNeeded = " + updateNeeded); if (updateNeeded) { // The platform endpoint is out of sync with the current data; // update the token and enable it. System.out.println("Updating platform endpoint " + endpointArn); Map attribs = new HashMap(); attribs.put("Token", token); attribs.put("Enabled", "true"); SetEndpointAttributesRequest saeReq = new SetEndpointAttributesRequest() .withEndpointArn(endpointArn) .withAttributes(attribs); client.setEndpointAttributes(saeReq); } } /** * @return never null * */ private String createEndpoint(String token) { String endpointArn = null; try { System.out.println("Creating platform endpoint with token " + token); CreatePlatformEndpointRequest cpeReq = new CreatePlatformEndpointRequest() .withPlatformApplicationArn(applicationArn) .withToken(token); CreatePlatformEndpointResult cpeRes = client .createPlatformEndpoint(cpeReq); endpointArn = cpeRes.getEndpointArn(); } catch (InvalidParameterException ipe) { String message = ipe.getErrorMessage(); System.out.println("Exception message: " + message); Pattern p = Pattern .compile(".*Endpoint (arn:aws:sns[^ ]+) already exists " + "with the same [Tt]oken.*"); Matcher m = p.matcher(message); if (m.matches()) { // The platform endpoint already exists for this token, but with additional // custom data that createEndpoint doesn't want to overwrite. Use the // existing platform endpoint. endpointArn = m.group(1); } else { // Rethrow the exception, because the input is actually bad. throw ipe; } } storeEndpointArn(endpointArn); return endpointArn; } /** * @return the ARN the app was registered under previously, or null if no * platform endpoint ARN is stored. */ private String retrieveEndpointArn() { // Retrieve the platform endpoint ARN from permanent storage, // or return null if null is stored. return arnStorage; } /** * Stores the platform endpoint ARN in permanent storage for lookup next time. * */ private void storeEndpointArn(String endpointArn) { // Write the platform endpoint ARN to permanent storage. arnStorage = endpointArn; } }
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在 GitHub
中查找说明和更多代码。
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有关 Amazon 软件开发工具包开发人员指南和代码示例的完整列表,请参阅 将 Amazon SNS 与 Amazon 开发工具包结合使用。本主题还包括有关入门的信息以及有关先前的软件开发工具包版本的详细信息。
场景
创建并发布到 FIFO 主题