com.kenshoo.pl.entity.ChangeFlowConfig Maven / Gradle / Ivy

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A Java persistence layer based on JOOQ for high performance and business flow support.
There is a newer version: 0.1.121-jooq-3.16.3
package com.kenshoo.pl.entity;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.kenshoo.pl.entity.internal.*;
import com.kenshoo.pl.entity.internal.audit.AuditedFieldsResolver;
import com.kenshoo.pl.entity.internal.audit.AuditRecordGenerator;
import com.kenshoo.pl.entity.spi.*;
import com.kenshoo.pl.entity.spi.helpers.EntityChangeCompositeValidator;
import com.kenshoo.pl.entity.spi.helpers.ImmutableFieldValidatorImpl;
import org.jooq.lambda.Seq;

import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import static com.kenshoo.pl.entity.spi.PersistenceLayerRetryer.JUST_RUN_WITHOUT_CHECKING_DEADLOCKS;
import static java.util.stream.Collectors.toCollection;


public class ChangeFlowConfig> {

    private final static Label NonExcludebale = new Label() {
    };

    private final E entityType;
    private final List> postFetchCommandEnrichers;
    private final List> outputGenerators;
    private final List> validators;
    private final Set> requiredRelationFields;
    private final Set> requiredFields;

    private final List>> childFlows;
    private final List> postFetchFilters;
    private final List> postSupplyFilters;
    private final PersistenceLayerRetryer retryer;
    private final AuditRecordGenerator auditRecordGenerator;
    private final FeatureSet features;


    private ChangeFlowConfig(E entityType,
                             List> postFetchCommandEnrichers,
                             List> validators,
                             List> outputGenerators,
                             Set> requiredRelationFields,
                             Set> requiredFields,
                             List>> childFlows,
                             PersistenceLayerRetryer retryer,
                             AuditRecordGenerator auditRecordGenerator,
                             FeatureSet features) {
        this.entityType = entityType;
        this.postFetchCommandEnrichers = postFetchCommandEnrichers;
        this.outputGenerators = outputGenerators;
        this.validators = validators;
        this.requiredRelationFields = requiredRelationFields;
        this.requiredFields = requiredFields;
        this.childFlows = childFlows;
        this.postFetchFilters = ImmutableList.of(new MissingParentEntitiesFilter<>(entityType.determineForeignKeys(requiredRelationFields)), new MissingEntitiesFilter<>(entityType));
        this.postSupplyFilters = ImmutableList.of(new RequiredFieldsChangesFilter<>(requiredFields));
        this.retryer = retryer;
        this.auditRecordGenerator = auditRecordGenerator;
        this.features = features;
    }

    public E getEntityType() {
        return entityType;
    }

    public PersistenceLayerRetryer retryer() {
        return retryer;
    }

    public Optional> auditRecordGenerator() {
        return Optional.ofNullable(auditRecordGenerator);
    }

    public List> getPostFetchCommandEnrichers() {
        return postFetchCommandEnrichers;
    }

    public List> getValidators() {
        return validators;
    }

    public List> getOutputGenerators() {
        return outputGenerators;
    }

    public Stream> currentStateConsumers() {
        return Seq.concat(postFetchFilters,
                          postSupplyFilters,
                          postFetchCommandEnrichers,
                          validators,
                          outputGenerators)
                  .concat(Optional.ofNullable(auditRecordGenerator));
    }

    static > Builder builder(E entityType) {
        return new Builder<>(entityType);
    }

    public Set> getRequiredRelationFields() {
        return requiredRelationFields;
    }

    public Set> getRequiredFields() {
        return requiredFields;
    }

    public List>> childFlows() {
        return childFlows;
    }

    public List> getPostFetchFilters() {
        return postFetchFilters;
    }

    public List> getPostSupplyFilters() {
        return postSupplyFilters;
    }

    public Optional> getPrimaryIdentityField() {
        return getEntityType().getPrimaryIdentityField();
    }

    public FeatureSet getFeatures() {
        return this.features;
    }


    public static class Builder> {
        private final E entityType;
        private final List>> postFetchCommandEnrichers = new ArrayList<>();
        private final List>> validators = new ArrayList<>();
        private final List> outputGenerators = new ArrayList<>();
        private final Set> requiredRelationFields = new HashSet<>();
        private final Set> requiredFields = new HashSet<>();
        private Optional> falseUpdatesPurger = Optional.empty();
        private final List>> flowConfigBuilders = new ArrayList<>();
        private PersistenceLayerRetryer retryer = JUST_RUN_WITHOUT_CHECKING_DEADLOCKS;
        private final AuditedFieldsResolver auditedFieldsResolver;
        private FeatureSet features = FeatureSet.EMPTY;

        public Builder(E entityType) {
            this(entityType,
                 AuditedFieldsResolver.INSTANCE);
        }

        @VisibleForTesting
        Builder(final E entityType,
                final AuditedFieldsResolver auditedFieldsResolver) {
            this.entityType = entityType;
            this.auditedFieldsResolver = auditedFieldsResolver;
        }

        public Builder with(FeatureSet features) {
            this.features = features;
            this.flowConfigBuilders.forEach(builder -> builder.with(features));
            return this;
        }

        public Builder withLabeledPostFetchCommandEnricher(PostFetchCommandEnricher enricher, Label label) {
            postFetchCommandEnrichers.add(new Labeled<>(enricher, label));
            return this;
        }

        public Builder withPostFetchCommandEnricher(PostFetchCommandEnricher enricher) {
            postFetchCommandEnrichers.add(new Labeled<>(enricher, NonExcludebale));
            return this;
        }

        public Builder withLabeledPostFetchCommandEnrichers(Collection> enrichers, Label label) {
            enrichers.forEach(e -> postFetchCommandEnrichers.add(new Labeled<>(e, label)));
            return this;
        }

        public Builder withPostFetchCommandEnrichers(Collection> enrichers) {
            enrichers.forEach(e -> postFetchCommandEnrichers.add(new Labeled<>(e, NonExcludebale)));
            return this;
        }

        /* not public */ void withFalseUpdatesPurger(FalseUpdatesPurger falseUpdatesPurger) {
            this.falseUpdatesPurger = Optional.of(falseUpdatesPurger);
        }

        public Builder withoutFalseUpdatesPurger() {
            this.falseUpdatesPurger = Optional.empty();
            this.flowConfigBuilders.forEach(Builder::withoutFalseUpdatesPurger);
            return this;
        }

        public Builder withValidator(ChangesValidator validator) {
            this.validators.add(new Labeled<>(validator, NonExcludebale));
            return this;
        }

        public Builder withValidators(Collection> validators) {
            validators.forEach(validator -> this.validators.add(new Labeled<>(validator, NonExcludebale)));
            return this;
        }

        public Builder withLabeledValidator(ChangesValidator validator, Label label) {
            this.validators.add(new Labeled<>(validator, label));
            return this;
        }

        public Builder withLabeledValidators(Collection> validators, Label label) {
            validators.forEach(validator -> this.validators.add(new Labeled<>(validator, label)));
            return this;
        }

        public Builder withoutValidators() {
            this.validators.clear();
            this.flowConfigBuilders.forEach(Builder::withoutValidators);
            return this;
        }

        public Builder withoutLabeledElements(Label label) {
            this.withoutLabeledElements(ImmutableList.of(label));
            return this;
        }

        public Builder withoutLabeledElements(List labels) {
            if (!labels.isEmpty()) {
                this.validators.removeIf(validator -> labels.contains(validator.label()));
                this.postFetchCommandEnrichers.removeIf(enricher -> labels.contains(enricher.label()));
                this.flowConfigBuilders.forEach(builder -> builder.withoutLabeledElements(labels));
            }
            return this;
        }

        public Builder withOutputGenerator(OutputGenerator outputGenerator) {
            outputGenerators.add(outputGenerator);
            return this;
        }

        public Builder withOutputGenerators(Collection> outputGenerators) {
            this.outputGenerators.addAll(outputGenerators);
            return this;
        }

        public Builder withoutOutputGenerators() {
            this.outputGenerators.clear();
            this.flowConfigBuilders.forEach(Builder::withoutOutputGenerators);
            return this;
        }

        public Builder withChildFlowBuilder(ChangeFlowConfig.Builder> flowConfigBuilder) {
            this.flowConfigBuilders.add(flowConfigBuilder);
            return this;
        }

        /* not public */ void withRequiredRelationFields(Stream> requiredRelationFields) {
            requiredRelationFields.collect(toCollection(() -> this.requiredRelationFields));
        }

        /* not public */ void withRequiredFields(Stream> requiredFields) {
            requiredFields.collect(toCollection(() -> this.requiredFields));
        }

        /* not public */ void withImmutableFields(Stream> immutableFields) {
            EntityChangeCompositeValidator compositeValidator = new EntityChangeCompositeValidator<>();
            immutableFields.forEach(immutableField -> compositeValidator.register(entityType, new ImmutableFieldValidatorImpl<>(immutableField, Errors.FIELD_IS_IMMUTABLE)));
            this.withValidator(compositeValidator);
        }

        public Builder withRetryer(PersistenceLayerRetryer retryer) {
            this.retryer = retryer;
            return this;
        }

        public ChangeFlowConfig build() {
            ImmutableList.Builder> enrichers = ImmutableList.builder();
            postFetchCommandEnrichers.forEach(excludableElement -> enrichers.add(excludableElement.element()));
            ImmutableList.Builder> validatorList = ImmutableList.builder();
            validators.forEach(validator -> validatorList.add(validator.element()));
            falseUpdatesPurger.ifPresent(enrichers::add);
            final AuditRecordGenerator auditRecordGenerator = auditedFieldsResolver.resolve(entityType)
                                                                                      .map(AuditRecordGenerator::new)
                                                                                      .orElse(null);
            return new ChangeFlowConfig<>(entityType,
                                          enrichers.build(),
                                          validatorList.build(),
                                          ImmutableList.copyOf(outputGenerators),
                                          ImmutableSet.copyOf(requiredRelationFields),
                                          ImmutableSet.copyOf(requiredFields),
                                          flowConfigBuilders.stream().map(Builder::build).collect(Collectors.toList()),
                                          retryer,
                                          auditRecordGenerator,
                                          features
            );
        }

        static private class Labeled {

            private final Element element;
            private final Label label;

            Labeled(Element element, Label label) {
                this.element = element;
                this.label = label;
            }

            Element element() {
                return element;
            }

            Label label() {
                return label;
            }
        }
    }

}