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TicketService.java
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TicketService.java
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/*
* Copyright 2022 Jeremy KUHN
*
* Licensed 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 io.inverno.app.ticket.internal.service;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.inverno.app.ticket.TicketApp;
import io.inverno.app.ticket.internal.exception.TicketException;
import io.inverno.app.ticket.internal.model.Ticket;
import io.inverno.core.annotation.Bean;
import io.inverno.mod.redis.RedisTransactionalClient;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.util.List;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
/**
* <p>
* Ticket service is used to create/read/update/delete {@link Ticket} in Redis data store.
* </p>
*
* @author <a href="mailto:jeremy.kuhn@inverno.io">Jeremy Kuhn</a>
*/
@Bean
public class TicketService {
public static final String REDIS_KEY_TICKET = TicketApp.REDIS_KEY + ":Ticket:%d";
public static final String REDIS_KEY_TICKET_SEQ = TicketApp.REDIS_KEY + ":Ticket:SEQ";
public static final String REDIS_KEY_TICKET_STATUS = TicketApp.REDIS_KEY + ":Ticket:%s";
public static final String REDIS_KEY_TICKET_OPEN = String.format(REDIS_KEY_TICKET_STATUS, Ticket.Status.OPEN);
public static final String REDIS_KEY_TICKET_STUDIED = String.format(REDIS_KEY_TICKET_STATUS, Ticket.Status.STUDIED);
public static final String REDIS_KEY_TICKET_IN_PROGRESS = String.format(REDIS_KEY_TICKET_STATUS, Ticket.Status.IN_PROGRESS);
public static final String REDIS_KEY_TICKET_DONE = String.format(REDIS_KEY_TICKET_STATUS, Ticket.Status.DONE);
public static final String REDIS_KEY_TICKET_REJECTED = String.format(REDIS_KEY_TICKET_STATUS, Ticket.Status.REJECTED);
private final RedisTransactionalClient<String, String> redisClient;
private final ObjectMapper mapper;
/**
*
* @param redisClient
* @param mapper
*/
public TicketService(RedisTransactionalClient<String, String> redisClient, ObjectMapper mapper) {
this.redisClient = redisClient;
this.mapper = mapper;
}
/**
*
* @param ticket
* @return
*/
public Mono<Ticket> saveTicket(Ticket ticket) {
if(ticket.getId() != null) {
// Try to update
return Mono.from(this.redisClient.connection(operations -> {
try {
return operations
.setGet()
.xx()
.build(String.format(REDIS_KEY_TICKET, ticket.getId()), this.mapper.writeValueAsString(ticket))
.flatMap(result -> {
try {
Ticket oldTicket = this.mapper.readValue(result, Ticket.class);
if(!oldTicket.getStatus().equals(ticket.getStatus())) {
return operations.smove(String.format(REDIS_KEY_TICKET_STATUS, oldTicket.getStatus()), String.format(REDIS_KEY_TICKET_STATUS, ticket.getStatus()), Long.toString(ticket.getId())).thenReturn(ticket);
}
else {
return Mono.just(ticket);
}
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
});
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
}));
}
else {
return this.redisClient
.incr(REDIS_KEY_TICKET_SEQ)
.flatMap(ticketId -> {
ticket.setCreationDateTime(ZonedDateTime.now(ZoneOffset.UTC));
ticket.setStatus(Ticket.Status.OPEN);
ticket.setId(ticketId);
return this.redisClient.multi(operations -> {
try {
return Flux.just(
operations
.set()
.nx()
.build(String.format(REDIS_KEY_TICKET, ticketId), this.mapper.writeValueAsString(ticket)),
operations
.sadd(REDIS_KEY_TICKET_OPEN, Long.toString(ticketId))
);
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
});
})
.map(transactionResult -> {
if(transactionResult.wasDiscarded()) {
throw new TicketException("Error while creating ticket: transaction was discarded");
}
return ticket;
});
}
}
/**
*
* @param ticketId
* @param status
* @return
*/
public Mono<Ticket> updateTicketStatus(long ticketId, Ticket.Status status) {
return Mono.from(this.redisClient.connection(operations -> operations
.get(String.format(REDIS_KEY_TICKET, ticketId))
.flatMap(result -> {
try {
Ticket ticket = this.mapper.readValue(result, Ticket.class);
Ticket.Status oldStatus = ticket.getStatus();
if(status.equals(oldStatus)) {
return Mono.empty();
}
ticket.setStatus(status);
return Mono.when(
operations.set().xx().build(String.format(REDIS_KEY_TICKET, ticket.getId()), this.mapper.writeValueAsString(ticket)),
operations.smove(String.format(REDIS_KEY_TICKET_STATUS, oldStatus), String.format(REDIS_KEY_TICKET_STATUS, status), Long.toString(ticket.getId()))
).thenReturn(ticket);
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
})
));
}
/**
*
* @return
*/
public Flux<Ticket> listTickets() {
return this.listTickets(List.of(Ticket.Status.OPEN, Ticket.Status.STUDIED, Ticket.Status.IN_PROGRESS, Ticket.Status.DONE, Ticket.Status.REJECTED));
}
/**
*
* @param statuses
* @return
*/
public Flux<Ticket> listTickets(List<Ticket.Status> statuses) {
if(statuses == null || statuses.isEmpty()) {
return Flux.empty();
}
return Flux.from(this.redisClient.connection(operations -> operations
.sunion(keys -> statuses.forEach(status -> keys.key(String.format(REDIS_KEY_TICKET_STATUS, status))))
.collectList()
.filter(ticketIds -> !ticketIds.isEmpty())
.flatMapMany(ticketIds -> operations.mget(keys -> ticketIds.forEach(ticketId -> keys.key(String.format(REDIS_KEY_TICKET, Long.parseLong(ticketId))))))
.mapNotNull(opt -> opt
.getValue()
.map(result -> {
try {
return this.mapper.readValue(result, Ticket.class);
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
})
.orElse(null)
)
));
}
/**
*
* @param ticketId
* @return
*/
public Mono<Ticket> getTicket(long ticketId) {
return this.redisClient
.get(String.format(REDIS_KEY_TICKET, ticketId))
.map(result -> {
try {
return this.mapper.readValue(result, Ticket.class);
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
});
}
/**
*
* @param ticketIds
* @return
*/
public Flux<Ticket> getTickets(List<Long> ticketIds) {
if(ticketIds == null || ticketIds.isEmpty()) {
return Flux.empty();
}
return this.redisClient
.mget(keys -> ticketIds.forEach(ticketId -> keys.key(String.format(REDIS_KEY_TICKET, ticketId))))
.mapNotNull(opt -> opt
.getValue()
.map(result -> {
try {
return this.mapper.readValue(result, Ticket.class);
}
catch (JsonProcessingException ex) {
throw new UncheckedIOException(ex);
}
})
.orElse(null)
);
}
/**
*
* @param ticketId
* @return
*/
public Mono<Ticket> removeTicket(long ticketId) {
// TODO tickets are not removed from plan's ticket set
String ticketKey = String.format(REDIS_KEY_TICKET, ticketId);
return this.redisClient
.exists(ticketKey)
.flatMap(count -> {
if(count == 0) {
return Mono.empty();
}
String sTicketId = Long.toString(ticketId);
return this.redisClient
.multi(operations -> Flux.just(
operations.srem(String.format(REDIS_KEY_TICKET_OPEN, ticketId), sTicketId),
operations.srem(String.format(REDIS_KEY_TICKET_STUDIED, ticketId), sTicketId),
operations.srem(String.format(REDIS_KEY_TICKET_IN_PROGRESS, ticketId), sTicketId),
operations.srem(String.format(REDIS_KEY_TICKET_DONE, ticketId), sTicketId),
operations.srem(String.format(REDIS_KEY_TICKET_REJECTED, ticketId), sTicketId),
operations.del(String.format(NoteService.REDIS_KEY_TICKET_NOTES, ticketId)),
operations.getdel(String.format(REDIS_KEY_TICKET, ticketId))
))
.map(transactionResult -> {
if(transactionResult.wasDiscarded()) {
throw new TicketException("Error while removing ticket: transaction was discarded");
}
try {
return this.mapper.readValue(transactionResult.<String>get(6), Ticket.class);
}
catch (IOException ex) {
throw new UncheckedIOException(ex);
}
});
});
}
}