Added some tools for DCAE CBS removal

Issue-ID: HOLMES-488
Signed-off-by: Guangrong Fu <fu.guangrong@zte.com.cn>
Change-Id: I7834ee58ae9be6d502b5160897f3ed8c2ee46838

2 files changed, 104 insertions, 0 deletions

diff --git a/holmes-actions/src/main/java/org/onap/holmes/common/ConfigFileScanner.java b/holmes-actions/src/main/java/org/onap/holmes/common/ConfigFileScanner.java
new file mode 100644
index 0000000..efea832
--- /dev/null
+++ b/holmes-actions/src/main/java/org/onap/holmes/common/ConfigFileScanner.java
@@ -0,0 +1,55 @@
+/**
+ * Copyright 2021 ZTE Corporation.
+ * <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>
+ * http://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 org.onap.holmes.common;
+
+import org.apache.commons.lang3.StringUtils;
+import org.onap.holmes.common.utils.FileUtils;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ConfigFileScanner {
+    public synchronized Map<String, String> scan(String path, String fileNamePattern) {
+        File dir = new File(path);
+        Map<String, String> ret = new HashMap();
+        if (!dir.isDirectory()) {
+            ret.putAll(readFile(dir));
+        } else {
+            for (File file : dir.listFiles(pathname -> StringUtils.isBlank(fileNamePattern) ?
+                    true : pathname.getName().contains(fileNamePattern))) {
+                if (!file.isDirectory()) {
+                    ret.putAll(readFile(file));
+                }
+            }
+        }
+        return ret;
+    }
+
+    public synchronized Map<String, String> scan(String path) {
+        return scan(path, null);
+    }
+
+    private Map<String, String> readFile(File file) {
+        Map<String, String> ret = new HashMap();
+        String contents = FileUtils.readTextFile(file.getAbsolutePath());
+        if (StringUtils.isNotBlank(contents)) {
+            ret.put(file.getAbsolutePath(), contents);
+        }
+        return ret;
+    }
+}
diff --git a/holmes-actions/src/main/java/org/onap/holmes/common/utils/FileUtils.java b/holmes-actions/src/main/java/org/onap/holmes/common/utils/FileUtils.java
new file mode 100644
index 0000000..cf5de1c
--- /dev/null
+++ b/holmes-actions/src/main/java/org/onap/holmes/common/utils/FileUtils.java
@@ -0,0 +1,49 @@
+/**
+ * Copyright 2021 ZTE Corporation.
+ * <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>
+ * http://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 org.onap.holmes.common.utils;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class FileUtils {
+
+    final static private Logger LOGGER = LoggerFactory.getLogger(FileUtils.class);
+
+    static public String readTextFile(String path) {
+        try {
+            BufferedReader br = new BufferedReader(new FileReader(path));
+            StringBuilder sb = new StringBuilder();
+            String line;
+            while ((line = br.readLine()) != null) {
+                sb.append(line);
+            }
+            return sb.toString();
+        } catch (FileNotFoundException e) {
+            LOGGER.warn("No file found: {}", path);
+        } catch (IOException e) {
+            LOGGER.error(String.format("Failed to read file contents from '%s'.", path), e);
+        } catch (Exception e) {
+            LOGGER.warn("Unknown exception occurred!", e);
+        }
+        return null;
+    }
+}