| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package com.epam.datalab.backendapi.core.response.handlers; |
| |
| import com.epam.datalab.backendapi.core.FileHandlerCallback; |
| import com.epam.datalab.backendapi.core.commands.DockerAction; |
| import com.epam.datalab.dto.StatusBaseDTO; |
| import com.epam.datalab.dto.UserInstanceStatus; |
| import com.epam.datalab.exceptions.DatalabException; |
| import com.epam.datalab.rest.client.RESTService; |
| import com.fasterxml.jackson.annotation.JsonIgnore; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.core.JsonParser; |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.reflect.ParameterizedType; |
| import java.time.Instant; |
| import java.util.Date; |
| |
| public abstract class ResourceCallbackHandler<T extends StatusBaseDTO<?>> implements FileHandlerCallback { |
| private static final Logger log = LoggerFactory.getLogger(ResourceCallbackHandler.class); |
| final ObjectMapper mapper = new ObjectMapper().configure(JsonParser.Feature.AUTO_CLOSE_SOURCE, true); |
| |
| private static final String STATUS_FIELD = "status"; |
| protected static final String RESPONSE_NODE = "response"; |
| protected static final String RESULT_NODE = "result"; |
| private static final String ERROR_NODE = "error"; |
| |
| private static final String OK_STATUS = "ok"; |
| |
| @JsonIgnore |
| private final RESTService selfService; |
| @JsonProperty |
| private final String user; |
| @JsonProperty |
| private final String uuid; |
| @JsonProperty |
| private final DockerAction action; |
| @JsonProperty |
| private final Class<T> resultType; |
| |
| @SuppressWarnings("unchecked") |
| public ResourceCallbackHandler(RESTService selfService, String user, |
| String uuid, DockerAction action) { |
| this.selfService = selfService; |
| this.user = user; |
| this.uuid = uuid; |
| this.action = action; |
| this.resultType = |
| (Class<T>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[0]; |
| } |
| |
| public ResourceCallbackHandler(RESTService selfService, String user, |
| String uuid, |
| DockerAction action, |
| Class<T> resultType) { |
| this.selfService = selfService; |
| this.user = user; |
| this.uuid = uuid; |
| this.action = action; |
| this.resultType = resultType; |
| } |
| |
| @Override |
| public String getUUID() { |
| return uuid; |
| } |
| |
| @Override |
| public boolean checkUUID(String uuid) { |
| return this.uuid.equals(uuid); |
| } |
| |
| @Override |
| public String getUser() { |
| return user; |
| } |
| |
| public DockerAction getAction() { |
| return action; |
| } |
| |
| private void selfServicePost(T object) { |
| debugMessage("Send post request to self service {} for UUID {}, object is {}", |
| getCallbackURI(), uuid, object); |
| try { |
| selfService.post(getCallbackURI(), object, resultType); |
| } catch (Exception e) { |
| log.error("Send request or response error for UUID {}: {}", uuid, e.getLocalizedMessage(), e); |
| throw new DatalabException("Send request or responce error for UUID " + uuid + ": " + e.getLocalizedMessage() |
| , e); |
| } |
| } |
| |
| @Override |
| public boolean handle(String fileName, byte[] content) throws Exception { |
| debugMessage("Got file {} while waiting for UUID {}, for action {}, docker response: {}", |
| fileName, uuid, action.name(), new String(content)); |
| JsonNode document = mapper.readTree(content); |
| boolean success = isSuccess(document); |
| UserInstanceStatus status = calcStatus(action, success); |
| T result = getBaseStatusDTO(status); |
| |
| JsonNode resultNode = document.get(RESPONSE_NODE).get(RESULT_NODE); |
| if (success) { |
| debugMessage("Did {} resource for user: {}, UUID: {}", action, user, uuid); |
| } else { |
| log.error("Could not {} resource for user: {}, UUID: {}", action, user, uuid); |
| result.setErrorMessage(getTextValue(resultNode.get(ERROR_NODE))); |
| } |
| result = parseOutResponse(resultNode, result); |
| |
| selfServicePost(result); |
| return !UserInstanceStatus.FAILED.equals(status); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void handleError(String errorMessage) { |
| try { |
| selfServicePost((T) getBaseStatusDTO(UserInstanceStatus.FAILED) |
| .withErrorMessage(errorMessage)); |
| } catch (Exception t) { |
| throw new DatalabException("Could not send error message to Self Service for UUID " + uuid + ", user " + user + ": " + errorMessage, t); |
| } |
| } |
| |
| protected abstract String getCallbackURI(); |
| |
| protected abstract T parseOutResponse(JsonNode document, T baseStatus); |
| |
| @SuppressWarnings("unchecked") |
| protected T getBaseStatusDTO(UserInstanceStatus status) { |
| try { |
| return (T) resultType.newInstance() |
| .withRequestId(uuid) |
| .withUser(user) |
| .withStatus(status) |
| .withUptime(getUptime(status)); |
| } catch (Exception t) { |
| throw new DatalabException("Something went wrong", t); |
| } |
| } |
| |
| private boolean isSuccess(JsonNode document) { |
| return OK_STATUS.equals(document.get(STATUS_FIELD).textValue()); |
| } |
| |
| private UserInstanceStatus calcStatus(DockerAction action, boolean success) { |
| if (success) { |
| switch (action) { |
| case STATUS: |
| case GIT_CREDS: |
| case LIB_LIST: |
| case LIB_INSTALL: |
| case CREATE_IMAGE: |
| return UserInstanceStatus.CREATED; // Any status besides failed |
| case CREATE: |
| case CONFIGURE: |
| case START: |
| case RECONFIGURE_SPARK: |
| return UserInstanceStatus.RUNNING; |
| case STOP: |
| return UserInstanceStatus.STOPPED; |
| case TERMINATE: |
| return UserInstanceStatus.TERMINATED; |
| default: |
| break; |
| } |
| } |
| return UserInstanceStatus.FAILED; |
| } |
| |
| protected Date getUptime(UserInstanceStatus status) { |
| return UserInstanceStatus.RUNNING == status ? Date.from(Instant.now()) : null; |
| } |
| |
| protected String getTextValue(JsonNode jsonNode) { |
| return jsonNode != null ? jsonNode.textValue() : null; |
| } |
| |
| private void debugMessage(String format, Object... arguments) { |
| if (action == DockerAction.STATUS) { |
| log.trace(format, arguments); |
| } else { |
| log.debug(format, arguments); |
| } |
| } |
| |
| } |