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package com.structurizr.model;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.structurizr.util.StringUtils;
import com.structurizr.util.Url;
import javax.annotation.Nonnull;
import java.util.Collections;
import java.util.Set;
import java.util.TreeSet;
/**
* Represents a deployment instance of a {@link SoftwareSystem} or {@link Container}, which can be added to a {@link DeploymentNode}.
*/
public abstract class StaticStructureElementInstance extends DeploymentElement {
private static final int DEFAULT_HEALTH_CHECK_INTERVAL_IN_SECONDS = 60;
private static final long DEFAULT_HEALTH_CHECK_TIMEOUT_IN_MILLISECONDS = 0;
private Set deploymentGroups = new TreeSet<>();
private int instanceId;
private Set healthChecks = new TreeSet<>();
StaticStructureElementInstance() {
}
StaticStructureElementInstance(int instanceId, String environment, String... deploymentGroups) {
setInstanceId(instanceId);
setEnvironment(environment);
if (deploymentGroups != null) {
for (String deploymentGroup : deploymentGroups) {
if (!StringUtils.isNullOrEmpty(deploymentGroup)) {
this.deploymentGroups.add(deploymentGroup.trim());
}
}
}
if (this.deploymentGroups.isEmpty()) {
this.deploymentGroups.add(DEFAULT_DEPLOYMENT_GROUP);
}
}
@JsonIgnore
public abstract StaticStructureElement getElement();
/**
* Gets the deployment group of this element instance.
*
* @return a deployment group name
*/
public Set getDeploymentGroups() {
if (deploymentGroups.isEmpty()) {
return Collections.singleton(DEFAULT_DEPLOYMENT_GROUP);
} else {
return new TreeSet<>(deploymentGroups);
}
}
void setDeploymentGroups(Set deploymentGroups) {
if (deploymentGroups != null) {
this.deploymentGroups = new TreeSet<>(deploymentGroups);
} else {
this.deploymentGroups = new TreeSet<>();
}
}
// provided for backwards compatibility
void setDeploymentGroup(String deploymentGroup) {
this.deploymentGroups = Collections.singleton(deploymentGroup);
}
boolean inSameDeploymentGroup(StaticStructureElementInstance ssei) {
for (String deploymentGroup : getDeploymentGroups()) {
if (ssei.getDeploymentGroups().contains(deploymentGroup)) {
return true;
}
}
return false;
}
/**
* Gets the instance ID of this element instance.
*
* @return the instance ID, an integer greater than zero
*/
public int getInstanceId() {
return instanceId;
}
void setInstanceId(int instanceId) {
this.instanceId = instanceId;
}
@Override
@JsonIgnore
public Set getDefaultTags() {
return Collections.emptySet();
}
@Override
public boolean removeTag(String tag) {
// do nothing ... tags cannot be removed from element instances (they should reflect the element they are based upon)
return false;
}
@Override
@JsonIgnore
public String getName() {
return getElement().getName();
}
@Override
public void setName(String name) {
// no-op ... the name of an element instance is taken from the associated element
}
/**
* Gets the set of health checks associated with this element instance.
*
* @return a Set of HttpHealthCheck instances
*/
@Nonnull
public Set getHealthChecks() {
return new TreeSet<>(healthChecks);
}
void setHealthChecks(Set healthChecks) {
this.healthChecks = healthChecks;
}
/**
* Adds a new health check, with the default interval (60 seconds) and timeout (0 milliseconds).
*
* @param name the name of the health check
* @param url the URL of the health check
* @return a HttpHealthCheck instance representing the health check that has been added
* @throws IllegalArgumentException if the name is empty, or the URL is not a well-formed URL
*/
@Nonnull
public HttpHealthCheck addHealthCheck(String name, String url) {
return addHealthCheck(name, url, DEFAULT_HEALTH_CHECK_INTERVAL_IN_SECONDS, DEFAULT_HEALTH_CHECK_TIMEOUT_IN_MILLISECONDS);
}
/**
* Adds a new health check.
*
* @param name the name of the health check
* @param url the URL of the health check
* @param interval the polling interval, in seconds
* @param timeout the timeout, in milliseconds
* @return a HttpHealthCheck instance representing the health check that has been added
* @throws IllegalArgumentException if the name is empty, the URL is not a well-formed URL, or the interval/timeout is not zero/a positive integer
*/
@Nonnull
public HttpHealthCheck addHealthCheck(String name, String url, int interval, long timeout) {
if (name == null || name.trim().length() == 0) {
throw new IllegalArgumentException("The name must not be null or empty.");
}
if (url == null || url.trim().length() == 0) {
throw new IllegalArgumentException("The URL must not be null or empty.");
}
if (!Url.isUrl(url)) {
throw new IllegalArgumentException(url + " is not a valid URL.");
}
if (interval < 0) {
throw new IllegalArgumentException("The polling interval must be zero or a positive integer.");
}
if (timeout < 0) {
throw new IllegalArgumentException("The timeout must be zero or a positive integer.");
}
HttpHealthCheck healthCheck = new HttpHealthCheck(name, url, interval, timeout);
healthChecks.add(healthCheck);
return healthCheck;
}
/**
* Adds a relationship between this element instance and an infrastructure node.
*
* @param destination the destination InfrastructureNode
* @param description a short description of the relationship
* @param technology the technology
* @return a Relationship object
*/
public Relationship uses(InfrastructureNode destination, String description, String technology) {
return uses(destination, description, technology, null);
}
/**
* Adds a relationship between this element instance and an infrastructure node.
*
* @param destination the destination InfrastructureNode
* @param description a short description of the relationship
* @param technology the technology
* @param interactionStyle the interaction style (Synchronous vs Asynchronous)
* @return a Relationship object
*/
public Relationship uses(InfrastructureNode destination, String description, String technology, InteractionStyle interactionStyle) {
return uses(destination, description, technology, interactionStyle, new String[0]);
}
/**
* Adds a relationship between this element instance and an infrastructure node.
*
* @param destination the destination InfrastructureNode
* @param description a short description of the relationship
* @param technology the technology
* @param interactionStyle the interaction style (Synchronous vs Asynchronous)
* @param tags an array of tags
* @return a Relationship object
*/
public Relationship uses(InfrastructureNode destination, String description, String technology, InteractionStyle interactionStyle, String[] tags) {
return getModel().addRelationship(this, destination, description, technology, interactionStyle, tags);
}
}
