org.apache.james.webadmin.service.MailboxesExportTask Maven / Gradle / Ivy

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package org.apache.james.webadmin.service;

import java.time.Clock;
import java.time.Instant;
import java.util.Optional;

import org.apache.james.core.Username;
import org.apache.james.json.DTOModule;
import org.apache.james.server.task.json.dto.TaskDTO;
import org.apache.james.server.task.json.dto.TaskDTOModule;
import org.apache.james.task.Task;
import org.apache.james.task.TaskExecutionDetails;
import org.apache.james.task.TaskType;

import com.fasterxml.jackson.annotation.JsonProperty;

import reactor.core.scheduler.Schedulers;

public class MailboxesExportTask implements Task {
    static final TaskType TASK_TYPE = TaskType.of("MailboxesExportTask");

    public static class AdditionalInformation implements TaskExecutionDetails.AdditionalInformation {
        private static AdditionalInformation from(ExportService.Progress progress, Username username) {
            return new AdditionalInformation(username, progress.getStage(), Clock.systemUTC().instant());
        }

        private final Username username;
        private final ExportService.Stage stage;
        private final Instant timestamp;

        public AdditionalInformation(Username username, ExportService.Stage stage, Instant timestamp) {
            this.username = username;
            this.stage = stage;
            this.timestamp = timestamp;
        }

        public String getUsername() {
            return username.asString();
        }

        public ExportService.Stage getStage() {
            return stage;
        }

        @Override
        public Instant timestamp() {
            return timestamp;
        }
    }

    public static class MailboxesExportTaskDTO implements TaskDTO {
        private final String type;
        private final String username;

        public MailboxesExportTaskDTO(@JsonProperty("type") String type,
                                      @JsonProperty("username") String username) {
            this.type = type;
            this.username = username;
        }

        @Override
        public String getType() {
            return type;
        }

        public String getUsername() {
            return username;
        }
    }

    public static TaskDTOModule module(ExportService service) {
        return DTOModule
            .forDomainObject(MailboxesExportTask.class)
            .convertToDTO(MailboxesExportTaskDTO.class)
            .toDomainObjectConverter(dto -> new MailboxesExportTask(service, Username.of(dto.username)))
            .toDTOConverter((task, type) -> new MailboxesExportTaskDTO(type, task.username.asString()))
            .typeName(TASK_TYPE.asString())
            .withFactory(TaskDTOModule::new);
    }

    private final Username username;
    private final ExportService service;
    private final ExportService.Progress progress;

    MailboxesExportTask(ExportService service, Username username) {
        this.username = username;
        this.service = service;
        this.progress = new ExportService.Progress();
    }

    @Override
    public Result run() {
        return service.export(progress, username)
            .subscribeOn(Schedulers.elastic())
            .block();
    }

    @Override
    public TaskType type() {
        return TASK_TYPE;
    }

    @Override
    public Optional details() {
        return Optional.of(AdditionalInformation.from(progress, username));
    }
}