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 org.apache.fineract.infrastructure.codes.service; import java.util.Map; import javax.persistence.PersistenceException; import org.apache.commons.lang.exception.ExceptionUtils; import org.apache.fineract.infrastructure.codes.domain.Code; import org.apache.fineract.infrastructure.codes.domain.CodeRepository; import org.apache.fineract.infrastructure.codes.exception.CodeNotFoundException; import org.apache.fineract.infrastructure.codes.exception.SystemDefinedCodeCannotBeChangedException; import org.apache.fineract.infrastructure.codes.serialization.CodeCommandFromApiJsonDeserializer; import org.apache.fineract.infrastructure.core.api.JsonCommand; import org.apache.fineract.infrastructure.core.data.CommandProcessingResult; import org.apache.fineract.infrastructure.core.data.CommandProcessingResultBuilder; import org.apache.fineract.infrastructure.core.exception.PlatformDataIntegrityException; import org.apache.fineract.infrastructure.security.service.PlatformSecurityContext; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cache.annotation.CacheEvict; import org.springframework.dao.DataIntegrityViolationException; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; @Service public class CodeWritePlatformServiceJpaRepositoryImpl implements CodeWritePlatformService { private final static Logger logger = LoggerFactory.getLogger(CodeWritePlatformServiceJpaRepositoryImpl.class); private final PlatformSecurityContext context; private final CodeRepository codeRepository; private final CodeCommandFromApiJsonDeserializer fromApiJsonDeserializer; @Autowired public CodeWritePlatformServiceJpaRepositoryImpl(final PlatformSecurityContext context, final CodeRepository codeRepository, final CodeCommandFromApiJsonDeserializer fromApiJsonDeserializer) { this.context = context; this.codeRepository = codeRepository; this.fromApiJsonDeserializer = fromApiJsonDeserializer; } @Transactional @Override @CacheEvict(value = "codes", key = "T(org.apache.fineract.infrastructure.core.service.ThreadLocalContextUtil).getTenant().getTenantIdentifier().concat('cv')") public CommandProcessingResult createCode(final JsonCommand command) { try { this.context.authenticatedUser(); this.fromApiJsonDeserializer.validateForCreate(command.json()); final Code code = Code.fromJson(command); this.codeRepository.save(code); return new CommandProcessingResultBuilder().withCommandId(command.commandId()) .withEntityId(code.getId()).build(); } catch (final DataIntegrityViolationException dve) { handleCodeDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return CommandProcessingResult.empty(); } catch (final PersistenceException ee) { Throwable throwable = ExceptionUtils.getRootCause(ee.getCause()); handleCodeDataIntegrityIssues(command, throwable, ee); return CommandProcessingResult.empty(); } } @Transactional @Override @CacheEvict(value = "codes", key = "T(org.apache.fineract.infrastructure.core.service.ThreadLocalContextUtil).getTenant().getTenantIdentifier().concat('cv')") public CommandProcessingResult updateCode(final Long codeId, final JsonCommand command) { try { this.context.authenticatedUser(); this.fromApiJsonDeserializer.validateForUpdate(command.json()); final Code code = retrieveCodeBy(codeId); final Map<String, Object> changes = code.update(command); if (!changes.isEmpty()) { this.codeRepository.save(code); } return new CommandProcessingResultBuilder() // .withCommandId(command.commandId()) // .withEntityId(codeId) // .with(changes) // .build(); } catch (final DataIntegrityViolationException dve) { handleCodeDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return CommandProcessingResult.empty(); } catch (final PersistenceException ee) { Throwable throwable = ExceptionUtils.getRootCause(ee.getCause()); handleCodeDataIntegrityIssues(command, throwable, ee); return CommandProcessingResult.empty(); } } @Transactional @Override @CacheEvict(value = "codes", key = "T(org.apache.fineract.infrastructure.core.service.ThreadLocalContextUtil).getTenant().getTenantIdentifier().concat('cv')") public CommandProcessingResult deleteCode(final Long codeId) { this.context.authenticatedUser(); final Code code = retrieveCodeBy(codeId); if (code.isSystemDefined()) { throw new SystemDefinedCodeCannotBeChangedException(); } try { this.codeRepository.delete(code); this.codeRepository.flush(); } catch (final DataIntegrityViolationException e) { throw new PlatformDataIntegrityException("error.msg.cund.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + e.getMostSpecificCause()); } return new CommandProcessingResultBuilder().withEntityId(codeId).build(); } private Code retrieveCodeBy(final Long codeId) { final Code code = this.codeRepository.findOne(codeId); if (code == null) { throw new CodeNotFoundException(codeId.toString()); } return code; } /* * Guaranteed to throw an exception no matter what the data integrity issue * is. */ private void handleCodeDataIntegrityIssues(final JsonCommand command, final Throwable realCause, final Exception dve) { if (realCause.getMessage().contains("code_name")) { final String name = command.stringValueOfParameterNamed("name"); throw new PlatformDataIntegrityException("error.msg.code.duplicate.name", "A code with name '" + name + "' already exists", "name", name); } logger.error(dve.getMessage(), dve); throw new PlatformDataIntegrityException("error.msg.cund.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + realCause.getMessage()); } }