public void onApplicationEvent()

in components-starter/camel-hashicorp-vault-starter/src/main/java/org/apache/camel/component/hashicorp/vault/springboot/SpringBootHashicorpVaultPropertiesParser.java [40:95]
48 lines of code
11 McCabe index (conditional complexity)

    public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
        ConfigurableEnvironment environment = event.getEnvironment();
        if (Boolean.parseBoolean(environment.getProperty("camel.component.hashicorp-vault.early-resolve-properties"))) {
            Objects.requireNonNull(environment.getProperty("camel.vault.hashicorp.token"), "Hashicorp Vault token is required");
            Objects.requireNonNull(environment.getProperty("camel.vault.hashicorp.host"), "Hashicorp Vault host is required");
            Objects.requireNonNull(environment.getProperty("camel.vault.hashicorp.port"), "Hashicorp Vault port is required");
            Objects.requireNonNull(environment.getProperty("camel.vault.hashicorp.scheme"), "Hashicorp Vault scheme is required");

            String token = environment.getProperty("camel.vault.hashicorp.token");
            String host = environment.getProperty("camel.vault.hashicorp.host");

            int port = Integer.parseInt(environment.getProperty("camel.vault.hashicorp.port"));
            String scheme = environment.getProperty("camel.vault.hashicorp.scheme");

            VaultEndpoint vaultEndpoint = new VaultEndpoint();
            vaultEndpoint.setHost(host);
            vaultEndpoint.setPort(port);
            vaultEndpoint.setScheme(scheme);

            VaultTemplate client = new VaultTemplate(
                    vaultEndpoint,
                    new TokenAuthentication(token));
            HashicorpVaultPropertiesFunction hashicorpVaultPropertiesFunction = new HashicorpVaultPropertiesFunction(client);

            final Properties props = new Properties();
            for (PropertySource mutablePropertySources : event.getEnvironment().getPropertySources()) {
                if (mutablePropertySources instanceof MapPropertySource mapPropertySource) {
                    mapPropertySource.getSource().forEach((key, value) -> {
                        String stringValue = null;
                        if ((value instanceof OriginTrackedValue originTrackedValue &&
                                originTrackedValue.getValue() instanceof String v)) {
                            stringValue = v;
                        } else if (value instanceof String v) {
                            stringValue = v;
                        }

                        if (stringValue != null &&
                                stringValue.startsWith("{{hashicorp:") &&
                                stringValue.endsWith("}}")) {
                            LOG.debug("decrypting and overriding property {}", key);
                            try {
                                props.put(key, hashicorpVaultPropertiesFunction.apply(stringValue
                                        .replace("{{hashicorp:", "")
                                        .replace("}}", "")));
                            } catch (Exception e) {
                                // Log and do nothing
                                LOG.debug("failed to parse property {}. This exception is ignored.", key, e);
                            }
                        }
                    });
                }
            }

            environment.getPropertySources().addFirst(new PropertiesPropertySource("overridden-camel-hashicorp-vault-properties", props));
        }
    }