1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcaegen2/services/pmmapper/config/FilesProcessingConfig.java b/src/main/java/org/onap/dcaegen2/services/pmmapper/config/FilesProcessingConfig.java
new file mode 100644
index 0000000..ab549e4
--- /dev/null
+++ b/src/main/java/org/onap/dcaegen2/services/pmmapper/config/FilesProcessingConfig.java
@@ -0,0 +1,74 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nokia.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dcaegen2.services.pmmapper.config;
+
+import java.util.Optional;
+import org.onap.dcaegen2.services.pmmapper.exceptions.EnvironmentConfigException;
+import org.onap.logging.ref.slf4j.ONAPLogAdapter;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provides external configuration for files processing
+ *
+ */
+public class FilesProcessingConfig {
+
+    private static final String ENV_LIMIT_RATE = "PROCESSING_LIMIT_RATE";
+    private static final int DEFAULT_LIMIT_RATE = 1;
+    private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(FilesProcessingConfig.class));
+    private EnvironmentReader environmentReader;
+
+    /**
+     * Creates a FilesProcessingConfig
+     */
+    public FilesProcessingConfig(EnvironmentReader environmentReader) {
+        this.environmentReader = environmentReader;
+    }
+
+    /**
+     * Provides reactor limit rate value from environment variable.
+     * @returns value of limit rate
+     * @throws EnvironmentConfigException
+     */
+    public int getLimitRate() throws EnvironmentConfigException {
+        logger.unwrap().info("Trying to read " + ENV_LIMIT_RATE + " env.");
+        try {
+            return Optional.ofNullable(environmentReader.getVariable(ENV_LIMIT_RATE))
+                .map(this::parseIntegerValue)
+                .orElseGet(this::getDefaultLimitRate);
+        } catch (NumberFormatException exception) {
+            throw new EnvironmentConfigException(
+                ENV_LIMIT_RATE + " environment variable has incorrect value.\n"
+                    , exception);
+        }
+    }
+
+    private Integer parseIntegerValue(String val) throws NumberFormatException {
+        Integer value = Integer.valueOf(val);
+        logger.unwrap().info(ENV_LIMIT_RATE + " value is: " + value);
+        return value;
+    }
+
+    private int getDefaultLimitRate() {
+        logger.unwrap().info(ENV_LIMIT_RATE + " env not present. Setting limit rate to default value: " + DEFAULT_LIMIT_RATE);
+        return DEFAULT_LIMIT_RATE;
+    }
+}