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| * regarding copyright ownership. The ASF licenses this file * |
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| * "License"); you may not use this file except in compliance * |
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| * software distributed under the License is distributed on an * |
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| * specific language governing permissions and limitations * |
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| ****************************************************************/ |
| |
| package org.apache.james.mailbox.cassandra.mail.migration; |
| |
| import java.time.Clock; |
| import java.time.Instant; |
| import java.util.Optional; |
| |
| import javax.inject.Inject; |
| |
| import org.apache.james.backends.cassandra.migration.Migration; |
| import org.apache.james.mailbox.cassandra.mail.CassandraIdAndPath; |
| import org.apache.james.mailbox.cassandra.mail.CassandraMailboxPathDAOImpl; |
| import org.apache.james.mailbox.cassandra.mail.CassandraMailboxPathV2DAO; |
| import org.apache.james.task.Task; |
| import org.apache.james.task.TaskExecutionDetails; |
| import org.apache.james.task.TaskType; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import reactor.core.publisher.Mono; |
| |
| public class MailboxPathV2Migration implements Migration { |
| |
| static class MailboxPathV2MigrationTask implements Task { |
| private final MailboxPathV2Migration migration; |
| |
| MailboxPathV2MigrationTask(MailboxPathV2Migration migration) { |
| this.migration = migration; |
| } |
| |
| @Override |
| public Result run() throws InterruptedException { |
| return migration.runTask(); |
| } |
| |
| @Override |
| public TaskType type() { |
| return TYPE; |
| } |
| |
| @Override |
| public Optional<TaskExecutionDetails.AdditionalInformation> details() { |
| return Optional.of(migration.getAdditionalInformation()); |
| } |
| } |
| |
| public static class AdditionalInformation implements TaskExecutionDetails.AdditionalInformation { |
| private final long remainingCount; |
| private final long initialCount; |
| private final Instant timestamp; |
| |
| public AdditionalInformation(long remainingCount, long initialCount, Instant timestamp) { |
| this.remainingCount = remainingCount; |
| this.initialCount = initialCount; |
| this.timestamp = timestamp; |
| } |
| |
| public long getRemainingCount() { |
| return remainingCount; |
| } |
| |
| public long getInitialCount() { |
| return initialCount; |
| } |
| |
| @Override |
| public Instant timestamp() { |
| return timestamp; |
| } |
| } |
| |
| public static final Logger LOGGER = LoggerFactory.getLogger(MailboxPathV2Migration.class); |
| public static final TaskType TYPE = TaskType.of("Cassandra_mailboxPathV2Migration"); |
| private final CassandraMailboxPathDAOImpl daoV1; |
| private final CassandraMailboxPathV2DAO daoV2; |
| private final long initialCount; |
| |
| @Inject |
| public MailboxPathV2Migration(CassandraMailboxPathDAOImpl daoV1, CassandraMailboxPathV2DAO daoV2) { |
| this.daoV1 = daoV1; |
| this.daoV2 = daoV2; |
| this.initialCount = getCurrentCount(); |
| } |
| |
| @Override |
| public void apply() { |
| daoV1.readAll() |
| .flatMap(this::migrate) |
| .doOnError(t -> LOGGER.error("Error while performing migration", t)) |
| .blockLast(); |
| } |
| |
| private Mono<Void> migrate(CassandraIdAndPath idAndPath) { |
| return daoV2.save(idAndPath.getMailboxPath(), idAndPath.getCassandraId()) |
| .then(daoV1.delete(idAndPath.getMailboxPath())) |
| .onErrorResume(error -> handleErrorMigrate(idAndPath, error)) |
| .then(); |
| } |
| |
| private Mono<Void> handleErrorMigrate(CassandraIdAndPath idAndPath, Throwable throwable) { |
| LOGGER.error("Error while performing migration for path {}", idAndPath.getMailboxPath(), throwable); |
| return Mono.empty(); |
| } |
| |
| @Override |
| public Task asTask() { |
| return new MailboxPathV2MigrationTask(this); |
| } |
| |
| AdditionalInformation getAdditionalInformation() { |
| return new AdditionalInformation(getCurrentCount(), initialCount, Clock.systemUTC().instant()); |
| } |
| |
| private Long getCurrentCount() { |
| return daoV1.countAll().block(); |
| } |
| } |