com.netflix.spinnaker.echo.pipelinetriggers.eventhandlers.DockerEventHandler.java Source code

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Here is the source code for com.netflix.spinnaker.echo.pipelinetriggers.eventhandlers.DockerEventHandler.java

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/*
 * Copyright 2016 Google, Inc.
 *
 * 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 com.netflix.spinnaker.echo.pipelinetriggers.eventhandlers;

import static com.netflix.spinnaker.echo.pipelinetriggers.artifacts.ArtifactMatcher.anyArtifactsMatchExpected;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.netflix.spectator.api.Registry;
import com.netflix.spinnaker.echo.model.Pipeline;
import com.netflix.spinnaker.echo.model.Trigger;
import com.netflix.spinnaker.echo.model.trigger.DockerEvent;
import com.netflix.spinnaker.kork.artifacts.model.Artifact;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.regex.PatternSyntaxException;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * Implementation of TriggerEventHandler for events of type {@link DockerEvent}, which occur when
 * a new container is pushed to a docker registry.
 */
@Component
public class DockerEventHandler extends BaseTriggerEventHandler<DockerEvent> {
    private static final String TRIGGER_TYPE = "docker";

    @Autowired
    public DockerEventHandler(Registry registry, ObjectMapper objectMapper) {
        super(registry, objectMapper);
    }

    @Override
    public boolean handleEventType(String eventType) {
        return eventType.equalsIgnoreCase(DockerEvent.TYPE);
    }

    @Override
    public Class<DockerEvent> getEventType() {
        return DockerEvent.class;
    }

    @Override
    public boolean isSuccessfulTriggerEvent(DockerEvent dockerEvent) {
        // The event should always report a tag
        String tag = dockerEvent.getContent().getTag();
        return tag != null && !tag.isEmpty();
    }

    private static List<Artifact> getArtifacts(DockerEvent dockerEvent) {
        DockerEvent.Content content = dockerEvent.getContent();

        String name = content.getRegistry() + "/" + content.getRepository();
        String reference = name + ":" + content.getTag();
        return Collections.singletonList(Artifact.builder().type("docker/image").name(name)
                .version(content.getTag()).reference(reference).build());
    }

    @Override
    protected Function<Trigger, Pipeline> buildTrigger(Pipeline pipeline, DockerEvent dockerEvent) {
        return trigger -> pipeline
                .withTrigger(trigger.atTag(dockerEvent.getContent().getTag()).withEventId(dockerEvent.getEventId()))
                .withReceivedArtifacts(getArtifacts(dockerEvent));
    }

    @Override
    protected boolean isValidTrigger(Trigger trigger) {
        return trigger.isEnabled() && ((TRIGGER_TYPE.equals(trigger.getType()) && trigger.getAccount() != null
                && trigger.getRepository() != null));
    }

    private boolean matchTags(String suppliedTag, String incomingTag) {
        try {
            // use matches to handle regex or basic string compare
            return incomingTag.matches(suppliedTag);
        } catch (PatternSyntaxException e) {
            return false;
        }
    }

    @Override
    protected Predicate<Trigger> matchTriggerFor(DockerEvent dockerEvent, Pipeline pipeline) {
        return trigger -> isMatchingTrigger(dockerEvent, trigger, pipeline);
    }

    private boolean isMatchingTrigger(DockerEvent dockerEvent, Trigger trigger, Pipeline pipeline) {
        String account = dockerEvent.getContent().getAccount();
        String repository = dockerEvent.getContent().getRepository();
        String eventTag = dockerEvent.getContent().getTag();
        String triggerTagPattern = null;
        if (StringUtils.isNotBlank(trigger.getTag())) {
            triggerTagPattern = trigger.getTag().trim();
        }
        return trigger.getType().equals(TRIGGER_TYPE) && trigger.getRepository().equals(repository)
                && trigger.getAccount().equals(account)
                && ((triggerTagPattern == null && !eventTag.equals("latest"))
                        || triggerTagPattern != null && matchTags(triggerTagPattern, eventTag))
                && anyArtifactsMatchExpected(getArtifacts(dockerEvent), trigger, pipeline);
    }
}