/
StackdriverConfig.java
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/
StackdriverConfig.java
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/**
* Copyright 2018 VMware, Inc.
* <p>
* 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
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 io.micrometer.stackdriver;
import com.google.api.gax.core.CredentialsProvider;
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.monitoring.v3.MetricServiceSettings;
import io.micrometer.core.instrument.config.validate.InvalidReason;
import io.micrometer.core.instrument.config.validate.Validated;
import io.micrometer.core.instrument.step.StepRegistryConfig;
import io.micrometer.core.instrument.util.StringUtils;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import static io.micrometer.core.instrument.config.MeterRegistryConfigValidator.checkAll;
import static io.micrometer.core.instrument.config.MeterRegistryConfigValidator.checkRequired;
import static io.micrometer.core.instrument.config.validate.PropertyValidator.getBoolean;
import static io.micrometer.core.instrument.config.validate.PropertyValidator.getString;
/**
* {@link StepRegistryConfig} for Stackdriver.
*
* @author Jon Schneider
* @since 1.1.0
*/
public interface StackdriverConfig extends StepRegistryConfig {
@Override
default String prefix() {
return "stackdriver";
}
default String projectId() {
return getString(this, "projectId").required().get();
}
/**
* Return resource labels.
*
* @return resource labels.
* @since 1.4.0
*/
default Map<String, String> resourceLabels() {
return Collections.emptyMap();
}
default String resourceType() {
return getString(this, "resourceType").orElse("global");
}
/**
* Whether to use semantically correct metric types. This is {@code false} by default for the sake
* of backwards compatibility.
* For example, when this is {@code false}, counter metrics are published as the GAUGE MetricKind.
* When this is {@code true}, counter metrics are published as the CUMULATIVE MetricKind.
* <p></p>
* If you have published metrics to Stackdriver before, switching this flag will cause metrics
* publishing to fail until you delete the old MetricDescriptor with the previous MetricKind so that
* it can be recreated with the new MetricKind next time that metric is published.
* For example, the
* <a href="https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.metricDescriptors/delete">projects.metricDescriptors.delete API</a>
* can be used to delete an existing MetricDescriptor.
*
* @return a flag indicating if semantically correct metric types will be used
* @since 1.8.0
*/
default boolean useSemanticMetricTypes() {
return getBoolean(this, "useSemanticMetricTypes").orElse(false);
}
/**
* Return {@link CredentialsProvider} to use.
*
* @return {@code CredentialsProvider} to use
* @since 1.4.0
*/
default CredentialsProvider credentials() {
return getString(this, "credentials")
.flatMap((credentials, valid) -> {
if (StringUtils.isBlank(credentials)) {
return Validated.valid(valid.getProperty(), MetricServiceSettings.defaultCredentialsProviderBuilder().build());
}
try {
FixedCredentialsProvider provider = FixedCredentialsProvider.create(
GoogleCredentials.fromStream(new FileInputStream(credentials))
.createScoped(MetricServiceSettings.getDefaultServiceScopes())
);
return Validated.valid(valid.getProperty(), provider);
} catch (IOException t) {
return Validated.invalid(valid.getProperty(), credentials, "cannot read credentials file", InvalidReason.MALFORMED, t);
}
})
.get();
}
@Override
default Validated<?> validate() {
return checkAll(this,
c -> StepRegistryConfig.validate(c),
checkRequired("projectId", StackdriverConfig::projectId),
checkRequired("resourceLabels", StackdriverConfig::resourceLabels),
checkRequired("resourceType", StackdriverConfig::resourceType),
checkRequired("credentials", StackdriverConfig::credentials)
);
}
}