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| 1 | +/* |
| 2 | + * Copyright The OpenTelemetry Authors |
| 3 | + * SPDX-License-Identifier: Apache-2.0 |
| 4 | + */ |
| 5 | + |
| 6 | +package io.opentelemetry.contrib.cloudfoundry.resources; |
| 7 | + |
| 8 | +import com.fasterxml.jackson.core.JsonFactory; |
| 9 | +import com.fasterxml.jackson.core.JsonParser; |
| 10 | +import com.fasterxml.jackson.core.JsonToken; |
| 11 | +import io.opentelemetry.api.common.AttributeKey; |
| 12 | +import io.opentelemetry.api.common.Attributes; |
| 13 | +import io.opentelemetry.api.common.AttributesBuilder; |
| 14 | +import io.opentelemetry.sdk.resources.Resource; |
| 15 | +import io.opentelemetry.semconv.SchemaUrls; |
| 16 | +import java.io.IOException; |
| 17 | +import java.util.function.Function; |
| 18 | +import java.util.logging.Logger; |
| 19 | + |
| 20 | +public final class CloudFoundryResource { |
| 21 | + |
| 22 | + private static final String ENV_VCAP_APPLICATION = "VCAP_APPLICATION"; |
| 23 | + |
| 24 | + // copied from CloudfoundryIncubatingAttributes |
| 25 | + private static final AttributeKey<String> CLOUDFOUNDRY_APP_ID = |
| 26 | + AttributeKey.stringKey("cloudfoundry.app.id"); |
| 27 | + private static final AttributeKey<String> CLOUDFOUNDRY_APP_INSTANCE_ID = |
| 28 | + AttributeKey.stringKey("cloudfoundry.app.instance.id"); |
| 29 | + private static final AttributeKey<String> CLOUDFOUNDRY_APP_NAME = |
| 30 | + AttributeKey.stringKey("cloudfoundry.app.name"); |
| 31 | + private static final AttributeKey<String> CLOUDFOUNDRY_ORG_ID = |
| 32 | + AttributeKey.stringKey("cloudfoundry.org.id"); |
| 33 | + private static final AttributeKey<String> CLOUDFOUNDRY_ORG_NAME = |
| 34 | + AttributeKey.stringKey("cloudfoundry.org.name"); |
| 35 | + private static final AttributeKey<String> CLOUDFOUNDRY_PROCESS_ID = |
| 36 | + AttributeKey.stringKey("cloudfoundry.process.id"); |
| 37 | + private static final AttributeKey<String> CLOUDFOUNDRY_PROCESS_TYPE = |
| 38 | + AttributeKey.stringKey("cloudfoundry.process.type"); |
| 39 | + private static final AttributeKey<String> CLOUDFOUNDRY_SPACE_ID = |
| 40 | + AttributeKey.stringKey("cloudfoundry.space.id"); |
| 41 | + private static final AttributeKey<String> CLOUDFOUNDRY_SPACE_NAME = |
| 42 | + AttributeKey.stringKey("cloudfoundry.space.name"); |
| 43 | + private static final Logger LOG = Logger.getLogger(CloudFoundryResource.class.getName()); |
| 44 | + private static final JsonFactory JSON_FACTORY = new JsonFactory(); |
| 45 | + private static final Resource INSTANCE = buildResource(System::getenv); |
| 46 | + |
| 47 | + private CloudFoundryResource() {} |
| 48 | + |
| 49 | + public static Resource get() { |
| 50 | + return INSTANCE; |
| 51 | + } |
| 52 | + |
| 53 | + static Resource buildResource(Function<String, String> getenv) { |
| 54 | + String vcapAppRaw = getenv.apply(ENV_VCAP_APPLICATION); |
| 55 | + // If there is no VCAP_APPLICATION in the environment, we are likely not running in CloudFoundry |
| 56 | + if (vcapAppRaw == null || vcapAppRaw.isEmpty()) { |
| 57 | + return Resource.empty(); |
| 58 | + } |
| 59 | + |
| 60 | + AttributesBuilder builder = Attributes.builder(); |
| 61 | + try (JsonParser parser = JSON_FACTORY.createParser(vcapAppRaw)) { |
| 62 | + parser.nextToken(); |
| 63 | + while (parser.nextToken() != JsonToken.END_OBJECT) { |
| 64 | + String name = parser.currentName(); |
| 65 | + parser.nextToken(); |
| 66 | + String value = parser.getValueAsString(); |
| 67 | + switch (name) { |
| 68 | + case "application_id": |
| 69 | + builder.put(CLOUDFOUNDRY_APP_ID, value); |
| 70 | + break; |
| 71 | + case "application_name": |
| 72 | + builder.put(CLOUDFOUNDRY_APP_NAME, value); |
| 73 | + break; |
| 74 | + case "instance_index": |
| 75 | + builder.put(CLOUDFOUNDRY_APP_INSTANCE_ID, value); |
| 76 | + break; |
| 77 | + case "organization_id": |
| 78 | + builder.put(CLOUDFOUNDRY_ORG_ID, value); |
| 79 | + break; |
| 80 | + case "organization_name": |
| 81 | + builder.put(CLOUDFOUNDRY_ORG_NAME, value); |
| 82 | + break; |
| 83 | + case "process_id": |
| 84 | + builder.put(CLOUDFOUNDRY_PROCESS_ID, value); |
| 85 | + break; |
| 86 | + case "process_type": |
| 87 | + builder.put(CLOUDFOUNDRY_PROCESS_TYPE, value); |
| 88 | + break; |
| 89 | + case "space_id": |
| 90 | + builder.put(CLOUDFOUNDRY_SPACE_ID, value); |
| 91 | + break; |
| 92 | + case "space_name": |
| 93 | + builder.put(CLOUDFOUNDRY_SPACE_NAME, value); |
| 94 | + break; |
| 95 | + default: |
| 96 | + parser.skipChildren(); |
| 97 | + break; |
| 98 | + } |
| 99 | + } |
| 100 | + } catch (IOException e) { |
| 101 | + LOG.warning("Cannot parse contents of environment variable VCAP_APPLICATION. Invalid JSON"); |
| 102 | + } |
| 103 | + |
| 104 | + return Resource.create(builder.build(), SchemaUrls.V1_24_0); |
| 105 | + } |
| 106 | +} |
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