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package org.onap.so.apihandlerinfra;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.core.UriBuilder;
import javax.xml.bind.DatatypeConverter;
import org.camunda.bpm.engine.impl.persistence.entity.HistoricActivityInstanceEntity;
import org.camunda.bpm.engine.impl.persistence.entity.HistoricProcessInstanceEntity;
import org.json.JSONObject;
import org.onap.logging.filter.spring.SpringClientPayloadFilter;
import org.onap.so.logging.jaxrs.filter.SOSpringClientFilter;
import org.onap.so.utils.CryptoUtils;
import org.onap.so.apihandlerinfra.exceptions.ContactCamundaException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.core.env.Environment;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.BufferingClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.client.ResourceAccessException;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Flux;
@Component
public class CamundaRequestHandler {
private static Logger logger = LoggerFactory.getLogger(CamundaRequestHandler.class);
private static final String TIMEOUT = "30000";
private static final String RETRY_TIMEOUT = "15000";
private static final String TIMEOUT_PROPERTY = "mso.camunda.request.timeout";
private static final String RETRY_TIMEOUT_PROPERTY = "mso.camunda.request.timeout.retry";
@Autowired
private Environment env;
private String buildCamundaUrlString(boolean historyLookup, boolean sort, boolean active, String lookupId) {
UriBuilder uriBuilder = UriBuilder.fromUri(env.getProperty("mso.camundaURL"));
if (historyLookup) {
uriBuilder.path(env.getProperty("mso.camunda.rest.history.uri"));
uriBuilder.queryParam("processInstanceBusinessKey", lookupId);
if (active) {
uriBuilder.queryParam("active", true);
}
if (sort) {
uriBuilder.queryParam("sortBy", "startTime");
uriBuilder.queryParam("sortOrder", "desc");
}
} else {
uriBuilder.path(env.getProperty("mso.camunda.rest.activity.uri"));
uriBuilder.queryParam("processInstanceId", lookupId);
}
uriBuilder.queryParam("maxResults", 1);
return uriBuilder.build().toString();
}
public ResponseEntity<List<HistoricProcessInstanceEntity>> getCamundaProcessInstanceHistory(String requestId,
boolean retry, boolean activeOnly, boolean sort) {
String targetUrl = buildCamundaUrlString(true, sort, activeOnly, requestId);
HttpHeaders headers =
setCamundaHeaders(env.getRequiredProperty("mso.camundaAuth"), env.getRequiredProperty("mso.msoKey"));
HttpEntity<?> requestEntity = new HttpEntity<>(headers);
if (retry) {
RestTemplate restTemplate = getRestTemplate(retry);
RetryTemplate retryTemplate = getRetryTemplate();
return retryTemplate.execute(context -> {
if (context.getLastThrowable() != null) {
logger.error("Retrying: Last call resulted in exception: ", context.getLastThrowable());
}
if (context.getRetryCount() == 0) {
logger.info("Querying Camunda for process-instance history for requestId: {}", requestId);
} else {
logger.info(
"Retry: Querying Camunda for process-instance history for retryCount: {} and requestId: {}",
context.getRetryCount(), requestId);
}
return restTemplate.exchange(targetUrl, HttpMethod.GET, requestEntity,
new ParameterizedTypeReference<List<HistoricProcessInstanceEntity>>() {});
});
} else {
RestTemplate restTemplate = getRestTemplate(retry);
return restTemplate.exchange(targetUrl, HttpMethod.GET, requestEntity,
new ParameterizedTypeReference<List<HistoricProcessInstanceEntity>>() {});
}
}
protected ResponseEntity<List<HistoricActivityInstanceEntity>> getCamundaActivityHistory(String processInstanceId) {
RestTemplate restTemplate = getRestTemplate(false);
String targetUrl = buildCamundaUrlString(false, false, false, processInstanceId);
HttpHeaders headers =
setCamundaHeaders(env.getRequiredProperty("mso.camundaAuth"), env.getRequiredProperty("mso.msoKey"));
HttpEntity<?> requestEntity = new HttpEntity<>(headers);
return restTemplate.exchange(targetUrl, HttpMethod.GET, requestEntity,
new ParameterizedTypeReference<List<HistoricActivityInstanceEntity>>() {});
}
protected String getTaskName(String requestId) {
ResponseEntity<List<HistoricProcessInstanceEntity>> response = null;
String taskInformation = null;
try {
response = getCamundaProcessInstanceHistory(requestId, false, false, true);
} catch (RestClientException e) {
logger.warn("Error querying Camunda for process-instance history for requestId: {}, exception: {}",
requestId, e.getMessage());
}
if (response != null) {
taskInformation = getTaskInformation(response, requestId);
}
return taskInformation;
}
protected String getTaskInformation(ResponseEntity<List<HistoricProcessInstanceEntity>> response,
String requestId) {
List<HistoricProcessInstanceEntity> historicProcessInstanceList = response.getBody();
ResponseEntity<List<HistoricActivityInstanceEntity>> activityResponse = null;
String processInstanceId = null;
String taskInformation = null;
if (historicProcessInstanceList != null && !historicProcessInstanceList.isEmpty()) {
processInstanceId = historicProcessInstanceList.get(0).getId();
} else {
logger.warn("No processInstances returned for requestId: {} to get TaskInformation", requestId);
}
if (processInstanceId != null) {
try {
activityResponse = getCamundaActivityHistory(processInstanceId);
} catch (RestClientException e) {
logger.warn(
"Error querying Camunda for activity-instance history for processInstanceId: {}, for requestId: {}, exception: {}",
processInstanceId, requestId, e.getMessage());
}
} else {
logger.warn("No processInstanceId returned for requestId: {} to get TaskInformation", requestId);
}
if (activityResponse != null) {
taskInformation = getActivityName(activityResponse.getBody());
} else {
logger.warn("No activity history information returned for requestId: {} to get TaskInformation", requestId);
}
return taskInformation;
}
protected String getActivityName(List<HistoricActivityInstanceEntity> activityInstanceList) {
String activityName = null;
HistoricActivityInstanceEntity activityInstance = null;
String result = null;
if (activityInstanceList == null || activityInstanceList.isEmpty()) {
result = "No results returned on activityInstance history lookup.";
} else {
activityInstance = activityInstanceList.get(0);
activityName = activityInstance.getActivityName();
if (activityName == null) {
result = "Task name is null.";
} else {
result = "Last task executed: " + activityName;
}
}
return result;
}
protected HttpHeaders setCamundaHeaders(String auth, String msoKey) {
HttpHeaders headers = new HttpHeaders();
List<org.springframework.http.MediaType> acceptableMediaTypes = new ArrayList<>();
acceptableMediaTypes.add(org.springframework.http.MediaType.APPLICATION_JSON);
headers.setAccept(acceptableMediaTypes);
try {
String userCredentials = CryptoUtils.decrypt(auth, msoKey);
if (userCredentials != null) {
headers.add(HttpHeaders.AUTHORIZATION,
"Basic " + DatatypeConverter.printBase64Binary(userCredentials.getBytes()));
}
} catch (GeneralSecurityException e) {
logger.error("Security exception", e);
}
return headers;
}
protected RetryTemplate getRetryTemplate() {
RetryTemplate retryTemplate = new RetryTemplate();
Map<Class<? extends Throwable>, Boolean> retryableExceptions = new HashMap<>();
retryableExceptions.put(ResourceAccessException.class, true);
SimpleRetryPolicy policy = new SimpleRetryPolicy(2, retryableExceptions);
retryTemplate.setRetryPolicy(policy);
return retryTemplate;
}
protected void sendCamundaMessages(JSONObject msgJson) {
String url = env.getProperty("mso.camundaURL") + "/sobpmnengine/message";
HttpHeaders headers =
setCamundaHeaders(env.getRequiredProperty("mso.camundaAuth"), env.getRequiredProperty("mso.msoKey"));
headers.setContentType(org.springframework.http.MediaType.APPLICATION_JSON);
// Workflow may take a long time so use non-blocking request
Flux<String> flux = WebClient.create().post().uri(url).headers(httpHeaders -> {
httpHeaders.set(httpHeaders.AUTHORIZATION, headers.get(httpHeaders.AUTHORIZATION).get(0));
httpHeaders.set(httpHeaders.ACCEPT, headers.get(httpHeaders.ACCEPT).get(0));
httpHeaders.set(httpHeaders.CONTENT_TYPE, headers.get(httpHeaders.CONTENT_TYPE).get(0));
}).body(BodyInserters.fromObject(msgJson.toString())).retrieve().bodyToFlux(String.class);
flux.subscribe(res -> logger.debug("Send Camunda Message: " + res));
}
protected RestTemplate getRestTemplate(boolean retry) {
int timeout;
if (retry) {
timeout = Integer.parseInt(env.getProperty(RETRY_TIMEOUT_PROPERTY, RETRY_TIMEOUT));
} else {
timeout = Integer.parseInt(env.getProperty(TIMEOUT_PROPERTY, TIMEOUT));
}
RestTemplate restTemplate = new RestTemplate();
HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
factory.setConnectionRequestTimeout(timeout);
factory.setReadTimeout(timeout);
factory.setConnectTimeout(timeout);
restTemplate.setRequestFactory(new BufferingClientHttpRequestFactory(factory));
restTemplate.getInterceptors().add(new SOSpringClientFilter());
restTemplate.getInterceptors().add((new SpringClientPayloadFilter()));
return restTemplate;
}
}
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