Java tutorial
/** * 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.gst.useradministration.service; import java.util.Collection; import java.util.HashMap; import java.util.Map; import javax.persistence.PersistenceException; import org.apache.commons.lang.exception.ExceptionUtils; import com.gst.infrastructure.core.api.JsonCommand; import com.gst.infrastructure.core.data.CommandProcessingResult; import com.gst.infrastructure.core.data.CommandProcessingResultBuilder; import com.gst.infrastructure.core.exception.PlatformDataIntegrityException; import com.gst.infrastructure.security.service.PlatformSecurityContext; import com.gst.useradministration.command.PermissionsCommand; import com.gst.useradministration.domain.Permission; import com.gst.useradministration.domain.PermissionRepository; import com.gst.useradministration.domain.Role; import com.gst.useradministration.domain.RoleRepository; import com.gst.useradministration.exception.PermissionNotFoundException; import com.gst.useradministration.exception.RoleAssociatedException; import com.gst.useradministration.exception.RoleNotFoundException; import com.gst.useradministration.serialization.PermissionsCommandFromApiJsonDeserializer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cache.annotation.CacheEvict; import org.springframework.cache.annotation.Caching; import org.springframework.dao.DataIntegrityViolationException; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; @Service public class RoleWritePlatformServiceJpaRepositoryImpl implements RoleWritePlatformService { private final static Logger logger = LoggerFactory.getLogger(RoleWritePlatformServiceJpaRepositoryImpl.class); private final PlatformSecurityContext context; private final RoleRepository roleRepository; private final PermissionRepository permissionRepository; private final RoleDataValidator roleCommandFromApiJsonDeserializer; private final PermissionsCommandFromApiJsonDeserializer permissionsFromApiJsonDeserializer; @Autowired public RoleWritePlatformServiceJpaRepositoryImpl(final PlatformSecurityContext context, final RoleRepository roleRepository, final PermissionRepository permissionRepository, final RoleDataValidator roleCommandFromApiJsonDeserializer, final PermissionsCommandFromApiJsonDeserializer fromApiJsonDeserializer) { this.context = context; this.roleRepository = roleRepository; this.permissionRepository = permissionRepository; this.roleCommandFromApiJsonDeserializer = roleCommandFromApiJsonDeserializer; this.permissionsFromApiJsonDeserializer = fromApiJsonDeserializer; } @Transactional @Override public CommandProcessingResult createRole(final JsonCommand command) { try { this.context.authenticatedUser(); this.roleCommandFromApiJsonDeserializer.validateForCreate(command.json()); final Role entity = Role.fromJson(command); this.roleRepository.save(entity); return new CommandProcessingResultBuilder().withCommandId(command.commandId()) .withEntityId(entity.getId()).build(); } catch (final DataIntegrityViolationException dve) { handleDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .build(); } catch (final PersistenceException dve) { Throwable throwable = ExceptionUtils.getRootCause(dve.getCause()); handleDataIntegrityIssues(command, throwable, dve); return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .build(); } } /* * Guaranteed to throw an exception no matter what the data integrity issue * is. */ private void handleDataIntegrityIssues(final JsonCommand command, final Throwable realCause, final Exception dve) { if (realCause.getMessage().contains("unq_name")) { final String name = command.stringValueOfParameterNamed("name"); throw new PlatformDataIntegrityException("error.msg.role.duplicate.name", "Role with name `" + name + "` already exists", "name", name); } logAsErrorUnexpectedDataIntegrityException(dve); throw new PlatformDataIntegrityException("error.msg.role.unknown.data.integrity.issue", "Unknown data integrity issue with resource."); } private void logAsErrorUnexpectedDataIntegrityException(final Exception dve) { logger.error(dve.getMessage(), dve); } @Caching(evict = { @CacheEvict(value = "users", allEntries = true), @CacheEvict(value = "usersByUsername", allEntries = true) }) @Transactional @Override public CommandProcessingResult updateRole(final Long roleId, final JsonCommand command) { try { this.context.authenticatedUser(); this.roleCommandFromApiJsonDeserializer.validateForUpdate(command.json()); final Role role = this.roleRepository.findOne(roleId); if (role == null) { throw new RoleNotFoundException(roleId); } final Map<String, Object> changes = role.update(command); if (!changes.isEmpty()) { this.roleRepository.saveAndFlush(role); } return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .withEntityId(roleId) // .with(changes) // .build(); } catch (final DataIntegrityViolationException dve) { handleDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .build(); } catch (final PersistenceException dve) { Throwable throwable = ExceptionUtils.getRootCause(dve.getCause()); handleDataIntegrityIssues(command, throwable, dve); return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .build(); } } @Caching(evict = { @CacheEvict(value = "users", allEntries = true), @CacheEvict(value = "usersByUsername", allEntries = true) }) @Transactional @Override public CommandProcessingResult updateRolePermissions(final Long roleId, final JsonCommand command) { this.context.authenticatedUser(); final Role role = this.roleRepository.findOne(roleId); if (role == null) { throw new RoleNotFoundException(roleId); } final Collection<Permission> allPermissions = this.permissionRepository.findAll(); final PermissionsCommand permissionsCommand = this.permissionsFromApiJsonDeserializer .commandFromApiJson(command.json()); final Map<String, Boolean> commandPermissions = permissionsCommand.getPermissions(); final Map<String, Object> changes = new HashMap<>(); final Map<String, Boolean> changedPermissions = new HashMap<>(); for (final String permissionCode : commandPermissions.keySet()) { final boolean isSelected = commandPermissions.get(permissionCode).booleanValue(); final Permission permission = findPermissionByCode(allPermissions, permissionCode); final boolean changed = role.updatePermission(permission, isSelected); if (changed) { changedPermissions.put(permissionCode, isSelected); } } if (!changedPermissions.isEmpty()) { changes.put("permissions", changedPermissions); this.roleRepository.save(role); } return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .withEntityId(roleId) // .with(changes) // .build(); } private Permission findPermissionByCode(final Collection<Permission> allPermissions, final String permissionCode) { if (allPermissions != null) { for (final Permission permission : allPermissions) { if (permission.hasCode(permissionCode)) { return permission; } } } throw new PermissionNotFoundException(permissionCode); } /** * Method for Delete Role */ @Transactional @Override public CommandProcessingResult deleteRole(Long roleId) { try { /** * Checking the role present in DB or not using role_id */ final Role role = this.roleRepository.findOne(roleId); if (role == null) { throw new RoleNotFoundException(roleId); } /** * Roles associated with users can't be deleted */ final Integer count = this.roleRepository.getCountOfRolesAssociatedWithUsers(roleId); if (count > 0) { throw new RoleAssociatedException("error.msg.role.associated.with.users.deleted", roleId); } this.roleRepository.delete(role); return new CommandProcessingResultBuilder().withEntityId(roleId).build(); } catch (final DataIntegrityViolationException e) { throw new PlatformDataIntegrityException("error.msg.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + e.getMostSpecificCause()); } } /** * Method for disabling the role */ @Transactional @Override public CommandProcessingResult disableRole(Long roleId) { try { /** * Checking the role present in DB or not using role_id */ final Role role = this.roleRepository.findOne(roleId); if (role == null) { throw new RoleNotFoundException(roleId); } //if(role.isDisabled()){throw new RoleNotFoundException(roleId);} /** * Roles associated with users can't be disable */ final Integer count = this.roleRepository.getCountOfRolesAssociatedWithUsers(roleId); if (count > 0) { throw new RoleAssociatedException("error.msg.role.associated.with.users.disabled", roleId); } /** * Disabling the role */ role.disableRole(); this.roleRepository.save(role); return new CommandProcessingResultBuilder().withEntityId(roleId).build(); } catch (final DataIntegrityViolationException e) { throw new PlatformDataIntegrityException("error.msg.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + e.getMostSpecificCause()); } } /** * Method for Enabling the role */ @Transactional @Override public CommandProcessingResult enableRole(Long roleId) { try { /** * Checking the role present in DB or not using role_id */ final Role role = this.roleRepository.findOne(roleId); if (role == null) { throw new RoleNotFoundException(roleId); } //if(!role.isEnabled()){throw new RoleNotFoundException(roleId);} role.enableRole(); this.roleRepository.save(role); return new CommandProcessingResultBuilder().withEntityId(roleId).build(); } catch (final DataIntegrityViolationException e) { throw new PlatformDataIntegrityException("error.msg.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + e.getMostSpecificCause()); } } }