introduce base adaptor

introduce base adaptor for other adaptors to extend

Issue-ID: CCSDK-1595
Signed-off-by: Smokowski, Kevin (ks6305) <kevin.smokowski@att.com>
Change-Id: I35d4499491cd87a7d651fa9ed654ad7c677ae2b8

2 files changed, 133 insertions, 0 deletions

diff --git a/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/AbstractHttpAdapter.java b/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/AbstractHttpAdapter.java
new file mode 100644
index 00000000..fda4bafb
--- /dev/null
+++ b/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/AbstractHttpAdapter.java
@@ -0,0 +1,109 @@
+package org.onap.ccsdk.sli.adaptors.base.http;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.Properties;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLSession;
+import javax.ws.rs.client.ClientBuilder;
+import javax.xml.bind.DatatypeConverter;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class AbstractHttpAdapter {
+    protected static final String SDNC_CONFIG_DIR = "SDNC_CONFIG_DIR";
+    private static final String SDNC_CONFIG_DIR_DEFAULT = "/opt/sdnc/data/properties";
+    protected static final int DEFAULT_HTTP_CONNECT_TIMEOUT_MS = 60000; // 1 minute
+    protected static final int DEFAULT_HTTP_READ_TIMEOUT_MS = 1800000; // 30 minutes
+    protected ClientBuilder clientBuilder;
+
+    private static final Logger logger = LoggerFactory.getLogger(AbstractHttpAdapter.class);
+
+    public AbstractHttpAdapter() {
+        clientBuilder = ClientBuilder.newBuilder();
+        setTimeouts();
+        registerLoggingFilter();
+        defaultHostNameVerifier();
+    }
+    
+    private void defaultHostNameVerifier() {
+        clientBuilder.hostnameVerifier(new HostnameVerifier() {
+            @Override
+            public boolean verify(String hostname, SSLSession session) {
+                return true;
+            }
+        });
+    }
+
+    protected abstract void registerLoggingFilter();
+
+    private void setTimeouts() {
+        Integer httpReadTimeout = readOptionalInteger("HTTP_READ_TIMEOUT_MS", DEFAULT_HTTP_READ_TIMEOUT_MS);
+        Integer httpConnectTimeout = readOptionalInteger("HTTP_CONNECT_TIMEOUT_MS", DEFAULT_HTTP_CONNECT_TIMEOUT_MS);
+
+        // restore once we migrate to once we migrate to javax.ws.rs-api 2.1
+        // clientBuilder.connectTimeout(30, TimeUnit.SECONDS);
+        // clientBuilder.readTimeout(30, TimeUnit.SECONDS);
+
+        // Setting jersey specific properties is ugly, such behavior should be removed
+        // once we migrate to javax.ws.rs-api 2.1
+        clientBuilder.property("jersey.config.client.readTimeout", httpReadTimeout);
+        clientBuilder.property("jersey.config.client.connectTimeout", httpConnectTimeout);
+    }
+
+    public Properties getProperties(String propertiesFileName) throws FileNotFoundException, IOException {
+        // Check System property, then environment variable then default if null
+        String propDir = System.getProperty(SDNC_CONFIG_DIR);
+        if (propDir == null || propDir.length() < 1) {
+            propDir = System.getenv(SDNC_CONFIG_DIR);
+        }
+        if (propDir == null || propDir.length() < 1) {
+            propDir = SDNC_CONFIG_DIR_DEFAULT;
+        }
+        Properties properties = new Properties();
+        // forward slash is checked to support path src/test/resources on windows machine
+        if (!propDir.endsWith(File.separator) && !propDir.endsWith("/")) {
+            propDir = propDir + File.separator;
+        }
+        String path = propDir + propertiesFileName;
+        properties.load(new FileInputStream(path));
+        logger.trace("Initialized properties from ({}) properties ({})", path, properties);
+        return properties;
+    }
+
+    protected void addBasicAuthCredentials(String username, String password) {
+        String basicAuthValue = getBasicAuthValue(username,password);
+        clientBuilder.register(new BasicAuthFilter(basicAuthValue));
+    }
+
+    protected String getBasicAuthValue(String userName, String password) {
+        String token = userName + ":" + password;
+        try {
+            return "BASIC " + DatatypeConverter.printBase64Binary(token.getBytes("UTF-8"));
+        } catch (Exception e) {
+            logger.error("getBasicAuthValue threw an exception, credentials will be null", e);
+        }
+        return null;
+    }
+
+    public ClientBuilder getClientBuilder() {
+        return clientBuilder;
+    }
+
+    private Integer readOptionalInteger(String propertyName, Integer defaultValue) {
+        String stringValue = System.getProperty(propertyName);
+        if (stringValue != null && stringValue.length() > 0) {
+            try {
+                return Integer.valueOf(stringValue);
+            } catch (NumberFormatException e) {
+                logger.warn("property " + propertyName + " had the value " + stringValue + " that could not be converted to an Integer, default " + defaultValue + " will be used instead", e);
+            }
+        }
+        return defaultValue;
+    }
+
+}
diff --git a/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/BasicAuthFilter.java b/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/BasicAuthFilter.java
new file mode 100644
index 00000000..48d996ef
--- /dev/null
+++ b/base/http/provider/src/main/java/org/onap/ccsdk/sli/adaptors/base/http/BasicAuthFilter.java
@@ -0,0 +1,24 @@
+package org.onap.ccsdk.sli.adaptors.base.http;
+
+import java.io.IOException;
+
+import javax.ws.rs.client.ClientRequestContext;
+import javax.ws.rs.client.ClientRequestFilter;
+import javax.ws.rs.core.MultivaluedMap;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class BasicAuthFilter implements ClientRequestFilter {
+    private final String basicAuthValue;
+
+
+    public BasicAuthFilter(String basicAuthValue) {
+        this.basicAuthValue = basicAuthValue;
+    }
+
+    public void filter(ClientRequestContext requestContext) throws IOException {
+        MultivaluedMap<String, Object> headers = requestContext.getHeaders();
+        headers.add("Authorization", basicAuthValue);
+    }
+}