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.portfolio.fund.service; 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.portfolio.fund.domain.Fund; import com.gst.portfolio.fund.domain.FundRepository; import com.gst.portfolio.fund.exception.FundNotFoundException; import com.gst.portfolio.fund.serialization.FundCommandFromApiJsonDeserializer; 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 FundWritePlatformServiceJpaRepositoryImpl implements FundWritePlatformService { private final static Logger logger = LoggerFactory.getLogger(FundWritePlatformServiceJpaRepositoryImpl.class); private final PlatformSecurityContext context; private final FundCommandFromApiJsonDeserializer fromApiJsonDeserializer; private final FundRepository fundRepository; @Autowired public FundWritePlatformServiceJpaRepositoryImpl(final PlatformSecurityContext context, final FundCommandFromApiJsonDeserializer fromApiJsonDeserializer, final FundRepository fundRepository) { this.context = context; this.fromApiJsonDeserializer = fromApiJsonDeserializer; this.fundRepository = fundRepository; } @Transactional @Override @CacheEvict(value = "funds", key = "T(com.gst.infrastructure.core.service.ThreadLocalContextUtil).getTenant().getTenantIdentifier().concat('fn')") public CommandProcessingResult createFund(final JsonCommand command) { try { this.context.authenticatedUser(); this.fromApiJsonDeserializer.validateForCreate(command.json()); final Fund fund = Fund.fromJson(command); this.fundRepository.save(fund); return new CommandProcessingResultBuilder().withCommandId(command.commandId()) .withEntityId(fund.getId()).build(); } catch (final DataIntegrityViolationException dve) { handleFundDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return CommandProcessingResult.empty(); } catch (final PersistenceException dve) { Throwable throwable = ExceptionUtils.getRootCause(dve.getCause()); handleFundDataIntegrityIssues(command, throwable, dve); return CommandProcessingResult.empty(); } } @Transactional @Override @CacheEvict(value = "funds", key = "T(com.gst.infrastructure.core.service.ThreadLocalContextUtil).getTenant().getTenantIdentifier().concat('fn')") public CommandProcessingResult updateFund(final Long fundId, final JsonCommand command) { try { this.context.authenticatedUser(); this.fromApiJsonDeserializer.validateForUpdate(command.json()); final Fund fund = this.fundRepository.findOne(fundId); if (fund == null) { throw new FundNotFoundException(fundId); } final Map<String, Object> changes = fund.update(command); if (!changes.isEmpty()) { this.fundRepository.saveAndFlush(fund); } return new CommandProcessingResultBuilder().withCommandId(command.commandId()) .withEntityId(fund.getId()).with(changes).build(); } catch (final DataIntegrityViolationException dve) { handleFundDataIntegrityIssues(command, dve.getMostSpecificCause(), dve); return CommandProcessingResult.empty(); } catch (final PersistenceException dve) { Throwable throwable = ExceptionUtils.getRootCause(dve.getCause()); handleFundDataIntegrityIssues(command, throwable, dve); return CommandProcessingResult.empty(); } } /* * Guaranteed to throw an exception no matter what the data integrity issue * is. */ private void handleFundDataIntegrityIssues(final JsonCommand command, final Throwable realCause, final Exception dve) { if (realCause.getMessage().contains("fund_externalid_org")) { final String externalId = command.stringValueOfParameterNamed("externalId"); throw new PlatformDataIntegrityException("error.msg.fund.duplicate.externalId", "A fund with external id '" + externalId + "' already exists", "externalId", externalId); } else if (realCause.getMessage().contains("fund_name_org")) { final String name = command.stringValueOfParameterNamed("name"); throw new PlatformDataIntegrityException("error.msg.fund.duplicate.name", "A fund with name '" + name + "' already exists", "name", name); } logger.error(dve.getMessage(), dve); throw new PlatformDataIntegrityException("error.msg.fund.unknown.data.integrity.issue", "Unknown data integrity issue with resource: " + realCause.getMessage()); } }