Improved ArgumentSanitizer (#4972)

* Improved ArgumentSanitizer
* Added retries to wait for URL to be available because of delay in DNS.
* added .editorconfig
* added url check and retry before post.

.editorconfig

@@ -0,0 +1,28 @@
+root = true
+
+[*.java]
+indent_style = tab
+indent_size = 4
+continuation_indent_size = 8
+
+[*.groovy]
+indent_style = tab
+indent_size = 4
+continuation_indent_size = 8
+
+[*.xml]
+indent_style = tab
+indent_size = 4
+continuation_indent_size = 8
+
+[*.yml]
+indent_style = space
+indent_size = 2
+
+[*.yaml]
+indent_style = space
+indent_size = 2
+
+[*.sh]
+indent_style = space
+indent_size = 4

spring-cloud-dataflow-rest-client/src/main/java/org/springframework/cloud/dataflow/rest/client/RuntimeTemplate.java

@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.dataflow.rest.client;
 
+import java.time.Duration;
 import java.util.Map;
 import java.util.Optional;
 
@@ -97,16 +98,16 @@ public PagedModel<AppStatusResource> status() {
 	@Override
 	public AppStatusResource status(String deploymentId) {
 		return this.restTemplate.getForObject(
-			appStatusUriTemplate.expand(deploymentId).getHref(),
-			AppStatusResource.class
+				appStatusUriTemplate.expand(deploymentId).getHref(),
+				AppStatusResource.class
 		);
 	}
 
 	@Override
 	public PagedModel<StreamStatusResource> streamStatus(String... streamNames) {
 		return this.restTemplate.getForObject(
-			streamStatusUriTemplate.expand(streamNames).getHref(),
-			StreamStatusResource.Page.class
+				streamStatusUriTemplate.expand(streamNames).getHref(),
+				StreamStatusResource.Page.class
 		);
 	}
 
@@ -131,11 +132,27 @@ public Object postToActuator(String appId, String instanceId, String endpoint, M
 	public void postToUrl(String appId, String instanceId, byte[] data, HttpHeaders headers) {
 		Assert.notNull(appUrlPostUriTemplate, "post endpoint not found");
 		String uri = appUrlPostUriTemplate.expand(appId, instanceId).getHref();
+		waitForUrl(uri, Duration.ofSeconds(30));
 		HttpEntity<byte[]> entity = new HttpEntity<>(data, headers);
 		ResponseEntity<String> response = this.restTemplate.exchange(uri, HttpMethod.POST, entity, String.class);
-
 		if (!response.getStatusCode().is2xxSuccessful()) {
 			throw new RuntimeException("POST:exception:" + response.getStatusCode() + ":" + response.getBody());
 		}
 	}
+
+	private void waitForUrl(String uri, Duration timeout) {
+		// Check
+		final long waitUntilMillis = System.currentTimeMillis() + timeout.toMillis();
+		do {
+			ResponseEntity<String> response = this.restTemplate.getForEntity(uri, String.class);
+			if (response.getStatusCode().is2xxSuccessful()) {
+				break;
+			}
+			try {
+				Thread.sleep(2000L);
+			} catch (InterruptedException e) {
+				Thread.currentThread().interrupt();
+			}
+		} while (waitUntilMillis <= System.currentTimeMillis());
+	}
 }